25403868 has 120 divisors (see below), whose sum is σ = 79360512. Its totient is φ = 6928416.

The previous prime is 25403857. The next prime is 25403897. The reversal of 25403868 is 86830452.

It is a super-2 number, since 2×25403868² = 1290713018722848, which contains 22 as substring.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 51921 + ... + 52407.

Almost surely, 2^25403868 is an apocalyptic number.

25403868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25403868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39680256).

25403868 is an abundant number, since it is smaller than the sum of its proper divisors (53956644).

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

25403868 is a wasteful number, since it uses less digits than its factorization.

25403868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533 (or 522 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 25403868 is about 5040.2249949779. The cubic root of 25403868 is about 293.9679265303.

The spelling of 25403868 in words is "twenty-five million, four hundred three thousand, eight hundred sixty-eight".