25937440 has 24 divisors (see below), whose sum is σ = 61277580. Its totient is φ = 10374912.

The previous prime is 25937423. The next prime is 25937441. The reversal of 25937440 is 4473952.

It can be written as a sum of positive squares in 2 ways, for example, as 25522704 + 414736 = 5052^2 + 644^2 .

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 25937396 and 25937405.

It is not an unprimeable number, because it can be changed into a prime (25937441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80895 + ... + 81214.

Almost surely, 2^25937440 is an apocalyptic number.

25937440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25937440 is an abundant number, since it is smaller than the sum of its proper divisors (35340140).

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

25937440 is a wasteful number, since it uses less digits than its factorization.

25937440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162124 (or 162116 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 25937440 is about 5092.8813062941. The cubic root of 25937440 is about 296.0118086353.

The spelling of 25937440 in words is "twenty-five million, nine hundred thirty-seven thousand, four hundred forty".