25978818 has 16 divisors (see below), whose sum is σ = 52030656. Its totient is φ = 8647440.

The previous prime is 25978817. The next prime is 25978861. The reversal of 25978818 is 81887952.

It is not an unprimeable number, because it can be changed into a prime (25978817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2308 + ... + 7568.

It is an arithmetic number, because the mean of its divisors is an integer number (3251916).

Almost surely, 2^25978818 is an apocalyptic number.

25978818 is an abundant number, since it is smaller than the sum of its proper divisors (26051838).

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

25978818 is a wasteful number, since it uses less digits than its factorization.

25978818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6089.

The product of its digits is 322560, while the sum is 48.

The square root of 25978818 is about 5096.9420243907. The cubic root of 25978818 is about 296.1691342247.

It can be divided in two parts, 25978 and 818, that added together give a triangular number (26796 = T₂₃₁).

The spelling of 25978818 in words is "twenty-five million, nine hundred seventy-eight thousand, eight hundred eighteen".