25405968 has 80 divisors (see below), whose sum is σ = 75995136. Its totient is φ = 7163520.

The previous prime is 25405889. The next prime is 25405987. The reversal of 25405968 is 86950452.

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, 27433 + ... + 28343.

Almost surely, 2^25405968 is an apocalyptic number.

25405968 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25405968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37997568).

25405968 is an abundant number, since it is smaller than the sum of its proper divisors (50589168).

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

25405968 is a wasteful number, since it uses less digits than its factorization.

25405968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012 (or 1006 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 25405968 is about 5040.4333147062. The cubic root of 25405968 is about 293.9760265518.

The spelling of 25405968 in words is "twenty-five million, four hundred five thousand, nine hundred sixty-eight".