25039730 has 16 divisors (see below), whose sum is σ = 45690264. Its totient is φ = 9878400.

The previous prime is 25039697. The next prime is 25039741. The reversal of 25039730 is 3793052.

It can be written as a sum of positive squares in 4 ways, for example, as 15311569 + 9728161 = 3913^2 + 3119^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25039693 and 25039702.

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, 16421 + ... + 17880.

Almost surely, 2^25039730 is an apocalyptic number.

25039730 is a deficient number, since it is larger than the sum of its proper divisors (20650534).

25039730 is a wasteful number, since it uses less digits than its factorization.

25039730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34381.

The product of its (nonzero) digits is 5670, while the sum is 29.

The square root of 25039730 is about 5003.9714227801. The cubic root of 25039730 is about 292.5565868069.

The spelling of 25039730 in words is "twenty-five million, thirty-nine thousand, seven hundred thirty".