258763978 has 16 divisors (see below), whose sum is σ = 425632896. Its totient is φ = 117008640.

The previous prime is 258763963. The next prime is 258763991. The reversal of 258763978 is 879367852.

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, 26226 + ... + 34717.

It is an arithmetic number, because the mean of its divisors is an integer number (26602056).

Almost surely, 2^258763978 is an apocalyptic number.

258763978 is a deficient number, since it is larger than the sum of its proper divisors (166868918).

258763978 is a wasteful number, since it uses less digits than its factorization.

258763978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61149.

The product of its digits is 5080320, while the sum is 55.

The square root of 258763978 is about 16086.1424213514. The cubic root of 258763978 is about 637.2374234796.

The spelling of 258763978 in words is "two hundred fifty-eight million, seven hundred sixty-three thousand, nine hundred seventy-eight".