258021490 has 16 divisors (see below), whose sum is σ = 473202648. Its totient is φ = 101261056.

The previous prime is 258021479. The next prime is 258021503. The reversal of 258021490 is 94120852.

It can be written as a sum of positive squares in 4 ways, for example, as 258019969 + 1521 = 16063^2 + 39^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242887 + ... + 243946.

Almost surely, 2^258021490 is an apocalyptic number.

258021490 is a deficient number, since it is larger than the sum of its proper divisors (215181158).

258021490 is a wasteful number, since it uses less digits than its factorization.

258021490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486893.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 258021490 is about 16063.0473447600. The cubic root of 258021490 is about 636.6273509281.

The spelling of 258021490 in words is "two hundred fifty-eight million, twenty-one thousand, four hundred ninety".