25961730 has 32 divisors (see below), whose sum is σ = 62596800. Its totient is φ = 6891072.

The previous prime is 25961717. The next prime is 25961743. The reversal of 25961730 is 3716952.

It is an interprime number because it is at equal distance from previous prime (25961717) and next prime (25961743).

It is a super-2 number, since 2×25961730² = 1348022849185800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25961691 and 25961700.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4981 + ... + 8759.

It is an arithmetic number, because the mean of its divisors is an integer number (1956150).

Almost surely, 2^25961730 is an apocalyptic number.

25961730 is an abundant number, since it is smaller than the sum of its proper divisors (36635070).

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

25961730 is a wasteful number, since it uses less digits than its factorization.

25961730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4018.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 25961730 is about 5095.2654494148. The cubic root of 25961730 is about 296.1041832557.

The spelling of 25961730 in words is "twenty-five million, nine hundred sixty-one thousand, seven hundred thirty".