257476940 has 24 divisors (see below), whose sum is σ = 617944992. Its totient is φ = 88277760.

The previous prime is 257476931. The next prime is 257476949. The reversal of 257476940 is 49674752.

257476940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (257476931) and next prime (257476949).

It is a junction number, because it is equal to n+sod(n) for n = 257476891 and 257476900.

It is not an unprimeable number, because it can be changed into a prime (257476949) 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, 919421 + ... + 919700.

It is an arithmetic number, because the mean of its divisors is an integer number (25747708).

Almost surely, 2^257476940 is an apocalyptic number.

257476940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257476940 is an abundant number, since it is smaller than the sum of its proper divisors (360468052).

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

257476940 is a wasteful number, since it uses less digits than its factorization.

257476940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839137 (or 1839135 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 44.

The square root of 257476940 is about 16046.0879967673. The cubic root of 257476940 is about 636.1791717287.

The spelling of 257476940 in words is "two hundred fifty-seven million, four hundred seventy-six thousand, nine hundred forty".