257433620 has 24 divisors (see below), whose sum is σ = 543449088. Its totient is φ = 102432800.

The previous prime is 257433619. The next prime is 257433623. The reversal of 257433620 is 26334752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257433623) 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, 29876 + ... + 37515.

It is an arithmetic number, because the mean of its divisors is an integer number (22643712).

Almost surely, 2^257433620 is an apocalyptic number.

257433620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257433620 is an abundant number, since it is smaller than the sum of its proper divisors (286015468).

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

257433620 is a wasteful number, since it uses less digits than its factorization.

257433620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67591 (or 67589 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 32.

The square root of 257433620 is about 16044.7380782610. The cubic root of 257433620 is about 636.1434910868.

The spelling of 257433620 in words is "two hundred fifty-seven million, four hundred thirty-three thousand, six hundred twenty".