25243940 has 24 divisors (see below), whose sum is σ = 53541432. Its totient is φ = 9996800.

The previous prime is 25243937. The next prime is 25243957. The reversal of 25243940 is 4934252.

It can be written as a sum of positive squares in 4 ways, for example, as 8809024 + 16434916 = 2968^2 + 4054^2 .

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, 4229 + ... + 8268.

It is an arithmetic number, because the mean of its divisors is an integer number (2230893).

Almost surely, 2^25243940 is an apocalyptic number.

25243940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25243940 is an abundant number, since it is smaller than the sum of its proper divisors (28297492).

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

25243940 is a wasteful number, since it uses less digits than its factorization.

25243940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12607 (or 12605 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 25243940 is about 5024.3347818393. The cubic root of 25243940 is about 293.3497436871.

The spelling of 25243940 in words is "twenty-five million, two hundred forty-three thousand, nine hundred forty".