256132020 has 24 divisors (see below), whose sum is σ = 717169824. Its totient is φ = 68301856.

The previous prime is 256131959. The next prime is 256132021. The reversal of 256132020 is 20231652.

It is a super-2 number, since 2×256132020² = 131207223338560800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256132021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2134374 + ... + 2134493.

It is an arithmetic number, because the mean of its divisors is an integer number (29882076).

Almost surely, 2^256132020 is an apocalyptic number.

256132020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256132020 is an abundant number, since it is smaller than the sum of its proper divisors (461037804).

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

256132020 is a wasteful number, since it uses less digits than its factorization.

256132020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4268879 (or 4268877 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 256132020 is about 16004.1250932377. The cubic root of 256132020 is about 635.0695523873.

Adding to 256132020 its reverse (20231652), we get a palindrome (276363672).

The spelling of 256132020 in words is "two hundred fifty-six million, one hundred thirty-two thousand, twenty".