25807432 has 32 divisors (see below), whose sum is σ = 55883520. Its totient is φ = 10944000.

The previous prime is 25807429. The next prime is 25807447. The reversal of 25807432 is 23470852.

It is a junction number, because it is equal to n+sod(n) for n = 25807394 and 25807403.

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, 3057 + ... + 7807.

It is an arithmetic number, because the mean of its divisors is an integer number (1746360).

Almost surely, 2^25807432 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 25807432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27941760).

25807432 is an abundant number, since it is smaller than the sum of its proper divisors (30076088).

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

25807432 is a wasteful number, since it uses less digits than its factorization.

25807432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4861 (or 4857 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 25807432 is about 5080.1015737877. The cubic root of 25807432 is about 295.5164066043.

The spelling of 25807432 in words is "twenty-five million, eight hundred seven thousand, four hundred thirty-two".