25990308 has 48 divisors (see below), whose sum is σ = 68237120. Its totient is φ = 8660520.

The previous prime is 25990303. The next prime is 25990319. The reversal of 25990308 is 80309952.

It is a super-2 number, since 2×25990308² = 1350992219869728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (25990303) 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, 7263 + ... + 10233.

Almost surely, 2^25990308 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25990308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34118560).

25990308 is an abundant number, since it is smaller than the sum of its proper divisors (42246812).

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

25990308 is an equidigital number, since it uses as much as digits as its factorization.

25990308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2996 (or 2976 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 25990308 is about 5098.0690462174. The cubic root of 25990308 is about 296.2127913531.

The spelling of 25990308 in words is "twenty-five million, nine hundred ninety thousand, three hundred eight".