25634280 has 64 divisors (see below), whose sum is σ = 87891840. Its totient is φ = 5859072.

The previous prime is 25634263. The next prime is 25634281. The reversal of 25634280 is 8243652.

It is a super-2 number, since 2×25634280² = 1314232622236800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (25634281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14419 + ... + 16098.

It is an arithmetic number, because the mean of its divisors is an integer number (1373310).

Almost surely, 2^25634280 is an apocalyptic number.

25634280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25634280 is an abundant number, since it is smaller than the sum of its proper divisors (62257560).

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

25634280 is a wasteful number, since it uses less digits than its factorization.

25634280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30538 (or 30534 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 25634280 is about 5063.0307129228. The cubic root of 25634280 is about 294.8540118415.

The spelling of 25634280 in words is "twenty-five million, six hundred thirty-four thousand, two hundred eighty".