256402452 has 24 divisors (see below), whose sum is σ = 614442976. Its totient is φ = 83157408.

The previous prime is 256402403. The next prime is 256402453. The reversal of 256402452 is 254204652.

It is a happy number.

It is a super-2 number, since 2×256402452² = 131484434783224608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256402453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288298 + ... + 289185.

Almost surely, 2^256402452 is an apocalyptic number.

It is an amenable number.

256402452 is an abundant number, since it is smaller than the sum of its proper divisors (358040524).

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

256402452 is a wasteful number, since it uses less digits than its factorization.

256402452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577527 (or 577525 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 256402452 is about 16012.5716860222. The cubic root of 256402452 is about 635.2929823731.

The spelling of 256402452 in words is "two hundred fifty-six million, four hundred two thousand, four hundred fifty-two".