256942500 has 60 divisors (see below), whose sum is σ = 749197680. Its totient is φ = 68516000.

The previous prime is 256942459. The next prime is 256942513. The reversal of 256942500 is 5249652.

It is a tau number, because it is divible by the number of its divisors (60).

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 an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9630 + ... + 24629.

It is an arithmetic number, because the mean of its divisors is an integer number (12486628).

Almost surely, 2^256942500 is an apocalyptic number.

256942500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256942500 is an abundant number, since it is smaller than the sum of its proper divisors (492255180).

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

256942500 is a wasteful number, since it uses less digits than its factorization.

256942500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34286 (or 34269 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 256942500 is about 16029.4260658328. The cubic root of 256942500 is about 635.7386984812.

The spelling of 256942500 in words is "two hundred fifty-six million, nine hundred forty-two thousand, five hundred".