25766540 has 24 divisors (see below), whose sum is σ = 54316752. Its totient is φ = 10267200.

The previous prime is 25766501. The next prime is 25766579. The reversal of 25766540 is 4566752.

It is an interprime number because it is at equal distance from previous prime (25766501) and next prime (25766579).

It is a self number, because there is not a number n which added to its sum of digits gives 25766540.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3215 + ... + 7865.

It is an arithmetic number, because the mean of its divisors is an integer number (2263198).

Almost surely, 2^25766540 is an apocalyptic number.

25766540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25766540 is an abundant number, since it is smaller than the sum of its proper divisors (28550212).

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

25766540 is a wasteful number, since it uses less digits than its factorization.

25766540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4937 (or 4935 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 25766540 is about 5076.0752555493. The cubic root of 25766540 is about 295.3602417052.

The spelling of 25766540 in words is "twenty-five million, seven hundred sixty-six thousand, five hundred forty".