257140370 has 8 divisors (see below), whose sum is σ = 462852684. Its totient is φ = 102856144.

The previous prime is 257140363. The next prime is 257140393. The reversal of 257140370 is 73041752.

It can be written as a sum of positive squares in 2 ways, for example, as 256416169 + 724201 = 16013^2 + 851^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×257140370² = 132242339767473800, which contains 22 as substring.

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, 12857009 + ... + 12857028.

Almost surely, 2^257140370 is an apocalyptic number.

257140370 is a deficient number, since it is larger than the sum of its proper divisors (205712314).

257140370 is a wasteful number, since it uses less digits than its factorization.

257140370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25714044.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 257140370 is about 16035.5969642542. The cubic root of 257140370 is about 635.9018495611.

The spelling of 257140370 in words is "two hundred fifty-seven million, one hundred forty thousand, three hundred seventy".