25813458 has 32 divisors (see below), whose sum is σ = 62579520. Its totient is φ = 7822080.

The previous prime is 25813453. The next prime is 25813493. The reversal of 25813458 is 85431852.

It is a happy number.

It is a super-2 number, since 2×25813458² = 1332669227835528, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (25813453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21135 + ... + 22322.

It is an arithmetic number, because the mean of its divisors is an integer number (1955610).

Almost surely, 2^25813458 is an apocalyptic number.

25813458 is an abundant number, since it is smaller than the sum of its proper divisors (36766062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25813458 is a wasteful number, since it uses less digits than its factorization.

25813458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43479 (or 43473 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 25813458 is about 5080.6946375471. The cubic root of 25813458 is about 295.5394057063.

The spelling of 25813458 in words is "twenty-five million, eight hundred thirteen thousand, four hundred fifty-eight".