25660032 has 64 divisors (see below), whose sum is σ = 71767200. Its totient is φ = 8100864.

The previous prime is 25660027. The next prime is 25660043. The reversal of 25660032 is 23006652.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 25659984 and 25660011.

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, 5538 + ... + 9054.

Almost surely, 2^25660032 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 25660032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35883600).

25660032 is an abundant number, since it is smaller than the sum of its proper divisors (46107168).

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

25660032 is a wasteful number, since it uses less digits than its factorization.

25660032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553 (or 3541 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 25660032 is about 5065.5732153430. The cubic root of 25660032 is about 294.9527148189.

Adding to 25660032 its reverse (23006652), we get a palindrome (48666684).

The spelling of 25660032 in words is "twenty-five million, six hundred sixty thousand, thirty-two".