25387720 has 32 divisors (see below), whose sum is σ = 57438720. Its totient is φ = 10098880.

The previous prime is 25387717. The next prime is 25387727. The reversal of 25387720 is 2778352.

It is not an unprimeable number, because it can be changed into a prime (25387727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5979 + ... + 9301.

It is an arithmetic number, because the mean of its divisors is an integer number (1794960).

Almost surely, 2^25387720 is an apocalyptic number.

25387720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25387720 is an abundant number, since it is smaller than the sum of its proper divisors (32051000).

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

25387720 is a wasteful number, since it uses less digits than its factorization.

25387720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3525 (or 3521 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 25387720 is about 5038.6228277179. The cubic root of 25387720 is about 293.9056263031.

The spelling of 25387720 in words is "twenty-five million, three hundred eighty-seven thousand, seven hundred twenty".