25978928 has 40 divisors (see below), whose sum is σ = 53590320. Its totient is φ = 12165120.

The previous prime is 25978919. The next prime is 25978933. The reversal of 25978928 is 82987952.

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, 29048 + ... + 29928.

It is an arithmetic number, because the mean of its divisors is an integer number (1339758).

Almost surely, 2^25978928 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 25978928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26795160).

25978928 is an abundant number, since it is smaller than the sum of its proper divisors (27611392).

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

25978928 is a wasteful number, since it uses less digits than its factorization.

25978928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005 (or 999 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 25978928 is about 5096.9528151632. The cubic root of 25978928 is about 296.1695522391.

The spelling of 25978928 in words is "twenty-five million, nine hundred seventy-eight thousand, nine hundred twenty-eight".