257363628 has 24 divisors (see below), whose sum is σ = 606348288. Its totient is φ = 84954576.

The previous prime is 257363621. The next prime is 257363651. The reversal of 257363628 is 826363752.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 257363628.

It is not an unprimeable number, because it can be changed into a prime (257363621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102876 + ... + 105347.

It is an arithmetic number, because the mean of its divisors is an integer number (25264512).

Almost surely, 2^257363628 is an apocalyptic number.

It is an amenable number.

257363628 is an abundant number, since it is smaller than the sum of its proper divisors (348984660).

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

257363628 is a wasteful number, since it uses less digits than its factorization.

257363628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208333 (or 208331 counting only the distinct ones).

The product of its digits is 362880, while the sum is 42.

The square root of 257363628 is about 16042.5567787682. The cubic root of 257363628 is about 636.0858335166.

The spelling of 257363628 in words is "two hundred fifty-seven million, three hundred sixty-three thousand, six hundred twenty-eight".