257532780 has 24 divisors (see below), whose sum is σ = 721091952. Its totient is φ = 68675392.

The previous prime is 257532757. The next prime is 257532809. The reversal of 257532780 is 87235752.

257532780 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2146047 + ... + 2146166.

It is an arithmetic number, because the mean of its divisors is an integer number (30045498).

Almost surely, 2^257532780 is an apocalyptic number.

257532780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257532780 is an abundant number, since it is smaller than the sum of its proper divisors (463559172).

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

257532780 is a wasteful number, since it uses less digits than its factorization.

257532780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4292225 (or 4292223 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 39.

The square root of 257532780 is about 16047.8278904031. The cubic root of 257532780 is about 636.2251586005.

The spelling of 257532780 in words is "two hundred fifty-seven million, five hundred thirty-two thousand, seven hundred eighty".