25192980 has 72 divisors (see below), whose sum is σ = 80923752. Its totient is φ = 6322176.

The previous prime is 25192961. The next prime is 25193009. The reversal of 25192980 is 8929152.

It can be written as a sum of positive squares in 4 ways, for example, as 2268036 + 22924944 = 1506^2 + 4788^2 .

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 23 ways as a sum of consecutive naturals, for example, 1057 + ... + 7176.

It is an arithmetic number, because the mean of its divisors is an integer number (1123941).

Almost surely, 2^25192980 is an apocalyptic number.

25192980 is a gapful number since it is divisible by the number (20) 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 25192980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40461876).

25192980 is an abundant number, since it is smaller than the sum of its proper divisors (55730772).

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

25192980 is a wasteful number, since it uses less digits than its factorization.

25192980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8265 (or 8260 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 25192980 is about 5019.2609017663. The cubic root of 25192980 is about 293.1522154420.

The spelling of 25192980 in words is "twenty-five million, one hundred ninety-two thousand, nine hundred eighty".