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1028298240 = 293651929
BaseRepresentation
bin111101010010101…
…001011000000000
32122122220222000000
4331102221120000
54101221020430
6250012000000
734324251024
oct7522513000
92578828000
101028298240
114884a1762
12248460000
131350676c8
149a7d6384
1560420e60
hex3d4a9600

1028298240 has 560 divisors, whose sum is σ = 4025300400. Its totient is φ = 250822656.

The previous prime is 1028298239. The next prime is 1028298251. The reversal of 1028298240 is 428928201.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1028298195 and 1028298204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 35458546 + ... + 35458574.

Almost surely, 21028298240 is an apocalyptic number.

1028298240 is a gapful number since it is divisible by the number (10) 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 1028298240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2012650200).

1028298240 is an abundant number, since it is smaller than the sum of its proper divisors (2997002160).

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

1028298240 is an frugal number, since it uses more digits than its factorization.

1028298240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1028298240 is about 32067.0896714997. The cubic root of 1028298240 is about 1009.3451429279.

The spelling of 1028298240 in words is "one billion, twenty-eight million, two hundred ninety-eight thousand, two hundred forty".