25786980 has 36 divisors (see below), whose sum is σ = 78221052. Its totient is φ = 6876480.

The previous prime is 25786967. The next prime is 25786993. The reversal of 25786980 is 8968752.

It is an interprime number because it is at equal distance from previous prime (25786967) and next prime (25786993).

It can be written as a sum of positive squares in 2 ways, for example, as 7485696 + 18301284 = 2736^2 + 4278^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71451 + ... + 71810.

It is an arithmetic number, because the mean of its divisors is an integer number (2172807).

Almost surely, 2^25786980 is an apocalyptic number.

25786980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25786980 is an abundant number, since it is smaller than the sum of its proper divisors (52434072).

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

25786980 is a wasteful number, since it uses less digits than its factorization.

25786980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143276 (or 143271 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 25786980 is about 5078.0882229437. The cubic root of 25786980 is about 295.4383218777.

The spelling of 25786980 in words is "twenty-five million, seven hundred eighty-six thousand, nine hundred eighty".