257533738 has 24 divisors (see below), whose sum is σ = 485273376. Its totient is φ = 100337160.

The previous prime is 257533723. The next prime is 257533763. The reversal of 257533738 is 837335752.

It is a junction number, because it is equal to n+sod(n) for n = 257533694 and 257533703.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74320 + ... + 77707.

It is an arithmetic number, because the mean of its divisors is an integer number (20219724).

Almost surely, 2^257533738 is an apocalyptic number.

257533738 is a deficient number, since it is larger than the sum of its proper divisors (227739638).

257533738 is a wasteful number, since it uses less digits than its factorization.

257533738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152058 (or 152047 counting only the distinct ones).

The product of its digits is 529200, while the sum is 43.

The square root of 257533738 is about 16047.8577386516. The cubic root of 257533738 is about 636.2259475007.

The spelling of 257533738 in words is "two hundred fifty-seven million, five hundred thirty-three thousand, seven hundred thirty-eight".