25166988 has 108 divisors (see below), whose sum is σ = 80792712. Its totient is φ = 6531840.

The previous prime is 25166971. The next prime is 25167013. The reversal of 25166988 is 88966152.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 6.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18756 + ... + 20052.

Almost surely, 2^25166988 is an apocalyptic number.

25166988 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 25166988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40396356).

25166988 is an abundant number, since it is smaller than the sum of its proper divisors (55625724).

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

25166988 is a wasteful number, since it uses less digits than its factorization.

25166988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 1320 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 25166988 is about 5016.6710077501. The cubic root of 25166988 is about 293.0513641425.

The spelling of 25166988 in words is "twenty-five million, one hundred sixty-six thousand, nine hundred eighty-eight".