257423332 has 12 divisors (see below), whose sum is σ = 458991036. Its totient is φ = 126283040.

The previous prime is 257423329. The next prime is 257423347. The reversal of 257423332 is 233324752.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 139570596 + 117852736 = 11814^2 + 10856^2 .

It is a junction number, because it is equal to n+sod(n) for n = 257423294 and 257423303.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 606919 + ... + 607342.

It is an arithmetic number, because the mean of its divisors is an integer number (38249253).

Almost surely, 2^257423332 is an apocalyptic number.

It is an amenable number.

257423332 is a deficient number, since it is larger than the sum of its proper divisors (201567704).

257423332 is a wasteful number, since it uses less digits than its factorization.

257423332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214318 (or 1214316 counting only the distinct ones).

The product of its digits is 30240, while the sum is 31.

The square root of 257423332 is about 16044.4174715070. The cubic root of 257423332 is about 636.1350167580.

The spelling of 257423332 in words is "two hundred fifty-seven million, four hundred twenty-three thousand, three hundred thirty-two".