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28104100 = 2252463607
BaseRepresentation
bin110101100110…
…1010110100100
31221212211120121
41223031112210
524143312400
62442211324
7460611103
oct153152644
957784517
1028104100
1114956032
1294b3b44
135a9005b
143a3803a
15270221a
hex1acd5a4

28104100 has 36 divisors (see below), whose sum is σ = 61218304. Its totient is φ = 11198880.

The previous prime is 28104047. The next prime is 28104107. The reversal of 28104100 is 140182.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28104107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45997 + ... + 46603.

Almost surely, 228104100 is an apocalyptic number.

28104100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28104100 is an abundant number, since it is smaller than the sum of its proper divisors (33114204).

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

28104100 is a wasteful number, since it uses less digits than its factorization.

28104100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084 (or 1077 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 28104100 is about 5301.3300217964. The cubic root of 28104100 is about 304.0347519136.

Adding to 28104100 its reverse (140182), we get a palindrome (28244282).

The spelling of 28104100 in words is "twenty-eight million, one hundred four thousand, one hundred".

Divisors: 1 2 4 5 10 20 25 50 100 463 607 926 1214 1852 2315 2428 3035 4630 6070 9260 11575 12140 15175 23150 30350 46300 60700 281041 562082 1124164 1405205 2810410 5620820 7026025 14052050 28104100