256673400 has 48 divisors (see below), whose sum is σ = 795689400. Its totient is φ = 68446080.

The previous prime is 256673393. The next prime is 256673401. The reversal of 256673400 is 4376652.

256673400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256673401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213295 + ... + 214494.

Almost surely, 2^256673400 is an apocalyptic number.

256673400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256673400 is an abundant number, since it is smaller than the sum of its proper divisors (539016000).

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

256673400 is a wasteful number, since it uses less digits than its factorization.

256673400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427808 (or 427799 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 256673400 is about 16021.0299294396. The cubic root of 256673400 is about 635.5166811783.

The spelling of 256673400 in words is "two hundred fifty-six million, six hundred seventy-three thousand, four hundred".