257463998 has 8 divisors (see below), whose sum is σ = 421304760. Its totient is φ = 117029080.

The previous prime is 257463971. The next prime is 257464007. The reversal of 257463998 is 899364752.

It is a happy number.

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

It is a super-2 number, since 2×257463998² = 132575420532288008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5851433 + ... + 5851476.

It is an arithmetic number, because the mean of its divisors is an integer number (52663095).

Almost surely, 2^257463998 is an apocalyptic number.

257463998 is a deficient number, since it is larger than the sum of its proper divisors (163840762).

257463998 is a wasteful number, since it uses less digits than its factorization.

257463998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11702922.

The product of its digits is 3265920, while the sum is 53.

The square root of 257463998 is about 16045.6847158356. The cubic root of 257463998 is about 636.1685124326.

The spelling of 257463998 in words is "two hundred fifty-seven million, four hundred sixty-three thousand, nine hundred ninety-eight".