256155800 has 48 divisors (see below), whose sum is σ = 596680560. Its totient is φ = 102270080.

The previous prime is 256155797. The next prime is 256155803. The reversal of 256155800 is 8551652.

It is an interprime number because it is at equal distance from previous prime (256155797) and next prime (256155803).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256155803) 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 11 ways as a sum of consecutive naturals, for example, 158597 + ... + 160203.

It is an arithmetic number, because the mean of its divisors is an integer number (12430845).

Almost surely, 2^256155800 is an apocalyptic number.

256155800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256155800 is an abundant number, since it is smaller than the sum of its proper divisors (340524760).

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

256155800 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 256155800 = (585001625)₉.

256155800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2420 (or 2411 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 256155800 is about 16004.8680094526. The cubic root of 256155800 is about 635.0892056461.

The spelling of 256155800 in words is "two hundred fifty-six million, one hundred fifty-five thousand, eight hundred".