25978380 has 48 divisors (see below), whose sum is σ = 77021280. Its totient is φ = 6519808.

The previous prime is 25978369. The next prime is 25978391. The reversal of 25978380 is 8387952.

It is an interprime number because it is at equal distance from previous prime (25978369) and next prime (25978391).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11715 + ... + 13754.

It is an arithmetic number, because the mean of its divisors is an integer number (1604610).

Almost surely, 2^25978380 is an apocalyptic number.

25978380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25978380 is an abundant number, since it is smaller than the sum of its proper divisors (51042900).

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

25978380 is a wasteful number, since it uses less digits than its factorization.

25978380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25498 (or 25496 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 25978380 is about 5096.8990572700. The cubic root of 25978380 is about 296.1674697557.

The spelling of 25978380 in words is "twenty-five million, nine hundred seventy-eight thousand, three hundred eighty".