258138764 has 24 divisors (see below), whose sum is σ = 489227760. Its totient is φ = 118471104.

The previous prime is 258138757. The next prime is 258138787. The reversal of 258138764 is 467831852.

258138764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 4559 + ... + 23174.

It is an arithmetic number, because the mean of its divisors is an integer number (20384490).

Almost surely, 2^258138764 is an apocalyptic number.

It is an amenable number.

258138764 is a deficient number, since it is larger than the sum of its proper divisors (231088996).

258138764 is a wasteful number, since it uses less digits than its factorization.

258138764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27929 (or 27927 counting only the distinct ones).

The product of its digits is 322560, while the sum is 44.

The square root of 258138764 is about 16066.6973582003. The cubic root of 258138764 is about 636.7237880215.

The spelling of 258138764 in words is "two hundred fifty-eight million, one hundred thirty-eight thousand, seven hundred sixty-four".