256102784 has 64 divisors (see below), whose sum is σ = 594203040. Its totient is φ = 107667456.

The previous prime is 256102757. The next prime is 256102787. The reversal of 256102784 is 487201652.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256102787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44792 + ... + 50184.

Almost surely, 2^256102784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256102784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297101520).

256102784 is an abundant number, since it is smaller than the sum of its proper divisors (338100256).

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

256102784 is an equidigital number, since it uses as much as digits as its factorization.

256102784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5467 (or 5455 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 256102784 is about 16003.2116776602. The cubic root of 256102784 is about 635.0453882865.

The spelling of 256102784 in words is "two hundred fifty-six million, one hundred two thousand, seven hundred eighty-four".