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28497984 = 263178731
BaseRepresentation
bin110110010110…
…1100001000000
31222121211212220
41230231201000
524243413414
62454451040
7464141334
oct154554100
958554786
1028497984
11150a4a59
129663a80
135b9a418
143adb7c4
15277dca9
hex1b2d840

28497984 has 56 divisors (see below), whose sum is σ = 79845408. Its totient is φ = 8939520.

The previous prime is 28497977. The next prime is 28497991. The reversal of 28497984 is 48979482.

It is an interprime number because it is at equal distance from previous prime (28497977) and next prime (28497991).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1102 + ... + 7629.

Almost surely, 228497984 is an apocalyptic number.

28497984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28497984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39922704).

28497984 is an abundant number, since it is smaller than the sum of its proper divisors (51347424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28497984 is a wasteful number, since it uses less digits than its factorization.

28497984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8763 (or 8753 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The square root of 28497984 is about 5338.3503069769. The cubic root of 28497984 is about 305.4485347199.

The spelling of 28497984 in words is "twenty-eight million, four hundred ninety-seven thousand, nine hundred eighty-four".

Divisors: 1 2 3 4 6 8 12 16 17 24 32 34 48 51 64 68 96 102 136 192 204 272 408 544 816 1088 1632 3264 8731 17462 26193 34924 52386 69848 104772 139696 148427 209544 279392 296854 419088 445281 558784 593708 838176 890562 1187416 1676352 1781124 2374832 3562248 4749664 7124496 9499328 14248992 28497984