258904644 has 12 divisors (see below), whose sum is σ = 604110864. Its totient is φ = 86301544.

The previous prime is 258904643. The next prime is 258904669. The reversal of 258904644 is 446409852.

258904644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×258904644² = 134063229369533472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 258904596 and 258904605.

It is not an unprimeable number, because it can be changed into a prime (258904643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10787682 + ... + 10787705.

It is an arithmetic number, because the mean of its divisors is an integer number (50342572).

Almost surely, 2^258904644 is an apocalyptic number.

It is an amenable number.

258904644 is an abundant number, since it is smaller than the sum of its proper divisors (345206220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

258904644 is a wasteful number, since it uses less digits than its factorization.

258904644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21575394 (or 21575392 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 258904644 is about 16090.5140999286. The cubic root of 258904644 is about 637.3528715448.

The spelling of 258904644 in words is "two hundred fifty-eight million, nine hundred four thousand, six hundred forty-four".