257603020 has 12 divisors (see below), whose sum is σ = 540966384. Its totient is φ = 103041200.

The previous prime is 257603009. The next prime is 257603029. The reversal of 257603020 is 20306752.

It is not an unprimeable number, because it can be changed into a prime (257603029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6440056 + ... + 6440095.

It is an arithmetic number, because the mean of its divisors is an integer number (45080532).

Almost surely, 2^257603020 is an apocalyptic number.

257603020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257603020 is an abundant number, since it is smaller than the sum of its proper divisors (283363364).

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

257603020 is a wasteful number, since it uses less digits than its factorization.

257603020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12880160 (or 12880158 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 257603020 is about 16050.0161993688. The cubic root of 257603020 is about 636.2829951123.

Adding to 257603020 its reverse (20306752), we get a palindrome (277909772).

The spelling of 257603020 in words is "two hundred fifty-seven million, six hundred three thousand, twenty".