258921044 has 6 divisors (see below), whose sum is σ = 453111834. Its totient is φ = 129460520.

The previous prime is 258921029. The next prime is 258921049. The reversal of 258921044 is 440129852.

It can be written as a sum of positive squares in only one way, i.e., 239011600 + 19909444 = 15460^2 + 4462^2 .

It is a junction number, because it is equal to n+sod(n) for n = 258920995 and 258921013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258921049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32365127 + ... + 32365134.

It is an arithmetic number, because the mean of its divisors is an integer number (75518639).

Almost surely, 2^258921044 is an apocalyptic number.

It is an amenable number.

258921044 is a deficient number, since it is larger than the sum of its proper divisors (194190790).

258921044 is a wasteful number, since it uses less digits than its factorization.

258921044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64730265 (or 64730263 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 258921044 is about 16091.0237088881. The cubic root of 258921044 is about 637.3663287083.

The spelling of 258921044 in words is "two hundred fifty-eight million, nine hundred twenty-one thousand, forty-four".