258039478 has 4 divisors (see below), whose sum is σ = 387059220. Its totient is φ = 129019738.

The previous prime is 258039433. The next prime is 258039487. The reversal of 258039478 is 874930852.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64509868 + ... + 64509871.

It is an arithmetic number, because the mean of its divisors is an integer number (96764805).

Almost surely, 2^258039478 is an apocalyptic number.

258039478 is a deficient number, since it is larger than the sum of its proper divisors (129019742).

258039478 is a wasteful number, since it uses less digits than its factorization.

258039478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129019741.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 258039478 is about 16063.6072536650. The cubic root of 258039478 is about 636.6421447691.

The spelling of 258039478 in words is "two hundred fifty-eight million, thirty-nine thousand, four hundred seventy-eight".