256153578 has 32 divisors (see below), whose sum is σ = 532560960. Its totient is φ = 82037760.

The previous prime is 256153571. The next prime is 256153591. The reversal of 256153578 is 875351652.

It is a super-2 number, since 2×256153578² = 131229311044404168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256153571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33226 + ... + 40202.

It is an arithmetic number, because the mean of its divisors is an integer number (16642530).

Almost surely, 2^256153578 is an apocalyptic number.

256153578 is an abundant number, since it is smaller than the sum of its proper divisors (276407382).

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

256153578 is a wasteful number, since it uses less digits than its factorization.

256153578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7222.

The product of its digits is 252000, while the sum is 42.

The square root of 256153578 is about 16004.7985929221. The cubic root of 256153578 is about 635.0873692998.

The spelling of 256153578 in words is "two hundred fifty-six million, one hundred fifty-three thousand, five hundred seventy-eight".