258478 has 16 divisors (see below), whose sum is σ = 437760. Its totient is φ = 113400.

The previous prime is 258469. The next prime is 258487. The reversal of 258478 is 874852.

It is an interprime number because it is at equal distance from previous prime (258469) and next prime (258487).

It is a congruent number.

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, 493 + ... + 871.

It is an arithmetic number, because the mean of its divisors is an integer number (27360).

2²⁵⁸⁴⁷⁸ is an apocalyptic number.

258478 is a deficient number, since it is larger than the sum of its proper divisors (179282).

258478 is a wasteful number, since it uses less digits than its factorization.

258478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423.

The product of its digits is 17920, while the sum is 34.

The square root of 258478 is about 508.4073170205. The cubic root of 258478 is about 63.7002585204.

It can be divided in two parts, 2584 and 78, that added together give a palindrome (2662).

The spelling of 258478 in words is "two hundred fifty-eight thousand, four hundred seventy-eight".