257620402 has 8 divisors (see below), whose sum is σ = 416156076. Its totient is φ = 118901712.

The previous prime is 257620399. The next prime is 257620403. The reversal of 257620402 is 204026752.

It can be written as a sum of positive squares in 2 ways, for example, as 257249521 + 370881 = 16039^2 + 609^2 .

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

It is not an unprimeable number, because it can be changed into a prime (257620403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4954213 + ... + 4954264.

Almost surely, 2^257620402 is an apocalyptic number.

257620402 is a deficient number, since it is larger than the sum of its proper divisors (158535674).

257620402 is a wasteful number, since it uses less digits than its factorization.

257620402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9908492.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 257620402 is about 16050.5576850152. The cubic root of 257620402 is about 636.2973060499.

The spelling of 257620402 in words is "two hundred fifty-seven million, six hundred twenty thousand, four hundred two".