25567440 has 40 divisors (see below), whose sum is σ = 79259808. Its totient is φ = 6817920.

The previous prime is 25567427. The next prime is 25567453. The reversal of 25567440 is 4476552.

It is an interprime number because it is at equal distance from previous prime (25567427) and next prime (25567453).

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 53026 + ... + 53505.

Almost surely, 2^25567440 is an apocalyptic number.

25567440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25567440 is an abundant number, since it is smaller than the sum of its proper divisors (53692368).

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

25567440 is a wasteful number, since it uses less digits than its factorization.

25567440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106547 (or 106541 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 25567440 is about 5056.4256149972. The cubic root of 25567440 is about 294.5975168118.

The spelling of 25567440 in words is "twenty-five million, five hundred sixty-seven thousand, four hundred forty".