257460280 has 64 divisors (see below), whose sum is σ = 722234880. Its totient is φ = 80246400.

The previous prime is 257460253. The next prime is 257460283. The reversal of 257460280 is 82064752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257460283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38716 + ... + 44875.

It is an arithmetic number, because the mean of its divisors is an integer number (11284920).

Almost surely, 2^257460280 is an apocalyptic number.

257460280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257460280 is an abundant number, since it is smaller than the sum of its proper divisors (464774600).

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

257460280 is a wasteful number, since it uses less digits than its factorization.

257460280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83620 (or 83616 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 257460280 is about 16045.5688587223. The cubic root of 257460280 is about 636.1654501457.

The spelling of 257460280 in words is "two hundred fifty-seven million, four hundred sixty thousand, two hundred eighty".