257802140 has 12 divisors (see below), whose sum is σ = 541384536. Its totient is φ = 103120848.

The previous prime is 257802133. The next prime is 257802143. The reversal of 257802140 is 41208752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257802143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6445034 + ... + 6445073.

It is an arithmetic number, because the mean of its divisors is an integer number (45115378).

Almost surely, 2^257802140 is an apocalyptic number.

257802140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257802140 is an abundant number, since it is smaller than the sum of its proper divisors (283582396).

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

257802140 is a wasteful number, since it uses less digits than its factorization.

257802140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12890116 (or 12890114 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 257802140 is about 16056.2181101279. The cubic root of 257802140 is about 636.4468959336.

The spelling of 257802140 in words is "two hundred fifty-seven million, eight hundred two thousand, one hundred forty".