25949916 has 48 divisors (see below), whose sum is σ = 67624480. Its totient is φ = 8605440.

The previous prime is 25949899. The next prime is 25949933. The reversal of 25949916 is 61994952.

It is an interprime number because it is at equal distance from previous prime (25949899) and next prime (25949933).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 25530 + ... + 26526.

Almost surely, 2^25949916 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 25949916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33812240).

25949916 is an abundant number, since it is smaller than the sum of its proper divisors (41674564).

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

25949916 is a wasteful number, since it uses less digits than its factorization.

25949916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251 (or 1243 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 25949916 is about 5094.1060059641. The cubic root of 25949916 is about 296.0592619352.

The spelling of 25949916 in words is "twenty-five million, nine hundred forty-nine thousand, nine hundred sixteen".