256180920 has 32 divisors (see below), whose sum is σ = 768543120. Its totient is φ = 68314880.

The previous prime is 256180829. The next prime is 256180921. The reversal of 256180920 is 29081652.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256180921) 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, 1067301 + ... + 1067540.

Almost surely, 2^256180920 is an apocalyptic number.

256180920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256180920 is an abundant number, since it is smaller than the sum of its proper divisors (512362200).

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

256180920 is a wasteful number, since it uses less digits than its factorization.

256180920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134855 (or 2134851 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 256180920 is about 16005.6527514500. The cubic root of 256180920 is about 635.1099650425.

The spelling of 256180920 in words is "two hundred fifty-six million, one hundred eighty thousand, nine hundred twenty".