25578868 has 24 divisors (see below), whose sum is σ = 51355584. Its totient is φ = 10920000.

The previous prime is 25578853. The next prime is 25578887. The reversal of 25578868 is 86887552.

It is a happy number.

It is a super-2 number, since 2×25578868² = 1308556976322848, which contains 22 as substring.

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, 6243 + ... + 9493.

It is an arithmetic number, because the mean of its divisors is an integer number (2139816).

Almost surely, 2^25578868 is an apocalyptic number.

25578868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25578868 is an abundant number, since it is smaller than the sum of its proper divisors (25776716).

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

25578868 is a wasteful number, since it uses less digits than its factorization.

25578868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3543 (or 3541 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 49.

The square root of 25578868 is about 5057.5555360273. Note that the first 4 decimals coincide. The cubic root of 25578868 is about 294.6414028239.

The spelling of 25578868 in words is "twenty-five million, five hundred seventy-eight thousand, eight hundred sixty-eight".