257842084 has 18 divisors (see below), whose sum is σ = 476224854. Its totient is φ = 122135040.

The previous prime is 257842031. The next prime is 257842087. The reversal of 257842084 is 480248752.

It can be written as a sum of positive squares in only one way, i.e., 171872100 + 85969984 = 13110^2 + 9272^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (257842087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87837 + ... + 90724.

Almost surely, 2^257842084 is an apocalyptic number.

It is an amenable number.

257842084 is a deficient number, since it is larger than the sum of its proper divisors (218382770).

257842084 is a wasteful number, since it uses less digits than its factorization.

257842084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178603 (or 178582 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 40.

The square root of 257842084 is about 16057.4619414153. The cubic root of 257842084 is about 636.4797647090.

The spelling of 257842084 in words is "two hundred fifty-seven million, eight hundred forty-two thousand, eighty-four".