25039980 has 216 divisors, whose sum is σ = 94112928. Its totient is φ = 5354496.

The previous prime is 25039961. The next prime is 25039999. The reversal of 25039980 is 8993052.

It is an interprime number because it is at equal distance from previous prime (25039961) and next prime (25039999).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 149857 + ... + 150023.

It is an arithmetic number, because the mean of its divisors is an integer number (435708).

Almost surely, 2^25039980 is an apocalyptic number.

25039980 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 25039980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47056464).

25039980 is an abundant number, since it is smaller than the sum of its proper divisors (69072948).

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

25039980 is a wasteful number, since it uses less digits than its factorization.

25039980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 25039980 is about 5003.9964028764. The cubic root of 25039980 is about 292.5575604450.

Adding to 25039980 its sum of digits (36), we get a square (25040016 = 5004²).

The spelling of 25039980 in words is "twenty-five million, thirty-nine thousand, nine hundred eighty".