257423330 has 16 divisors (see below), whose sum is σ = 464322240. Its totient is φ = 102755952.

The previous prime is 257423329. The next prime is 257423347. The reversal of 257423330 is 33324752.

It is a junction number, because it is equal to n+sod(n) for n = 257423293 and 257423302.

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, 21560 + ... + 31299.

It is an arithmetic number, because the mean of its divisors is an integer number (29020140).

Almost surely, 2^257423330 is an apocalyptic number.

257423330 is a deficient number, since it is larger than the sum of its proper divisors (206898910).

257423330 is a wasteful number, since it uses less digits than its factorization.

257423330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53353.

The product of its (nonzero) digits is 15120, while the sum is 29.

The square root of 257423330 is about 16044.4174091801. The cubic root of 257423330 is about 636.1350151105.

The spelling of 257423330 in words is "two hundred fifty-seven million, four hundred twenty-three thousand, three hundred thirty".