258378664 has 32 divisors (see below), whose sum is σ = 493027200. Its totient is φ = 126921600.

The previous prime is 258378649. The next prime is 258378671. The reversal of 258378664 is 466873852.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142564 + ... + 144364.

It is an arithmetic number, because the mean of its divisors is an integer number (15407100).

Almost surely, 2^258378664 is an apocalyptic number.

It is an amenable number.

258378664 is a deficient number, since it is larger than the sum of its proper divisors (234648536).

258378664 is a wasteful number, since it uses less digits than its factorization.

258378664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113 (or 2109 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 49.

The square root of 258378664 is about 16074.1613778138. The cubic root of 258378664 is about 636.9209723312.

The spelling of 258378664 in words is "two hundred fifty-eight million, three hundred seventy-eight thousand, six hundred sixty-four".