257266020 has 48 divisors (see below), whose sum is σ = 785832768. Its totient is φ = 62367360.

The previous prime is 257266003. The next prime is 257266039. The reversal of 257266020 is 20662752.

257266020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194239 + ... + 195558.

It is an arithmetic number, because the mean of its divisors is an integer number (16371516).

Almost surely, 2^257266020 is an apocalyptic number.

257266020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257266020 is an abundant number, since it is smaller than the sum of its proper divisors (528566748).

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

257266020 is a wasteful number, since it uses less digits than its factorization.

257266020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389820 (or 389818 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 257266020 is about 16039.5143317995. The cubic root of 257266020 is about 636.0054091546.

The spelling of 257266020 in words is "two hundred fifty-seven million, two hundred sixty-six thousand, twenty".