257473746 has 12 divisors (see below), whose sum is σ = 557859822. Its totient is φ = 85824576.

The previous prime is 257473739. The next prime is 257473751. The reversal of 257473746 is 647374752.

257473746 is a `hidden beast` number, since 2 + 574 + 7 + 3 + 74 + 6 = 666.

257473746 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 241958025 + 15515721 = 15555^2 + 3939^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7152031 + ... + 7152066.

Almost surely, 2^257473746 is an apocalyptic number.

257473746 is an abundant number, since it is smaller than the sum of its proper divisors (300386076).

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

257473746 is a wasteful number, since it uses less digits than its factorization.

257473746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14304105 (or 14304102 counting only the distinct ones).

The product of its digits is 987840, while the sum is 45.

The square root of 257473746 is about 16045.9884706427. The cubic root of 257473746 is about 636.1765411181.

The spelling of 257473746 in words is "two hundred fifty-seven million, four hundred seventy-three thousand, seven hundred forty-six".