25978992 has 160 divisors (see below), whose sum is σ = 79994880. Its totient is φ = 7188480.

The previous prime is 25978963. The next prime is 25979017. The reversal of 25978992 is 29987952.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328809 + ... + 328887.

It is an arithmetic number, because the mean of its divisors is an integer number (499968).

Almost surely, 2^25978992 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 25978992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39997440).

25978992 is an abundant number, since it is smaller than the sum of its proper divisors (54015888).

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

25978992 is a wasteful number, since it uses less digits than its factorization.

25978992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 145 counting only the distinct ones).

The product of its digits is 816480, while the sum is 51.

The square root of 25978992 is about 5096.9590934203. The cubic root of 25978992 is about 296.1697954469.

The spelling of 25978992 in words is "twenty-five million, nine hundred seventy-eight thousand, nine hundred ninety-two".