258390028 has 24 divisors (see below), whose sum is σ = 495225360. Its totient is φ = 117234240.

The previous prime is 258390007. The next prime is 258390043. The reversal of 258390028 is 820093852.

258390028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 39043 + ... + 45178.

It is an arithmetic number, because the mean of its divisors is an integer number (20634390).

Almost surely, 2^258390028 is an apocalyptic number.

It is an amenable number.

258390028 is a deficient number, since it is larger than the sum of its proper divisors (236835332).

258390028 is a wasteful number, since it uses less digits than its factorization.

258390028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84297 (or 84295 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 258390028 is about 16074.5148604865. The cubic root of 258390028 is about 636.9303098718.

It can be divided in two parts, 258 and 390028, that added together give a triangular number (390286 = T₈₈₃).

The spelling of 258390028 in words is "two hundred fifty-eight million, three hundred ninety thousand, twenty-eight".