257423336 has 8 divisors (see below), whose sum is σ = 482668770. Its totient is φ = 128711664.

The previous prime is 257423329. The next prime is 257423347. The reversal of 257423336 is 633324752.

It can be written as a sum of positive squares in only one way, i.e., 174504100 + 82919236 = 13210^2 + 9106^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 257423296 and 257423305.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16088951 + ... + 16088966.

Almost surely, 2^257423336 is an apocalyptic number.

It is an amenable number.

257423336 is a deficient number, since it is larger than the sum of its proper divisors (225245434).

257423336 is a wasteful number, since it uses less digits than its factorization.

257423336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32177923 (or 32177919 counting only the distinct ones).

The product of its digits is 90720, while the sum is 35.

The square root of 257423336 is about 16044.4175961610. The cubic root of 257423336 is about 636.1350200529.

It can be divided in two parts, 257423 and 336, that multiplied together give a triangular number (86494128 = T₁₃₁₅₂).

The spelling of 257423336 in words is "two hundred fifty-seven million, four hundred twenty-three thousand, three hundred thirty-six".