257235630 has 16 divisors (see below), whose sum is σ = 617365584. Its totient is φ = 68596160.

The previous prime is 257235617. The next prime is 257235647. The reversal of 257235630 is 36532752.

It is a junction number, because it is equal to n+sod(n) for n = 257235591 and 257235600.

It is a congruent number.

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, 4287231 + ... + 4287290.

It is an arithmetic number, because the mean of its divisors is an integer number (38585349).

Almost surely, 2^257235630 is an apocalyptic number.

257235630 is an abundant number, since it is smaller than the sum of its proper divisors (360129954).

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

257235630 is a wasteful number, since it uses less digits than its factorization.

257235630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8574531.

The product of its (nonzero) digits is 37800, while the sum is 33.

The square root of 257235630 is about 16038.5669559347. The cubic root of 257235630 is about 635.9803650835.

The spelling of 257235630 in words is "two hundred fifty-seven million, two hundred thirty-five thousand, six hundred thirty".