25779992 has 32 divisors (see below), whose sum is σ = 56075520. Its totient is φ = 10882080.

The previous prime is 25779977. The next prime is 25779997. The reversal of 25779992 is 29997752.

It is a self number, because there is not a number n which added to its sum of digits gives 25779992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25779997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317 + ... + 7187.

It is an arithmetic number, because the mean of its divisors is an integer number (1752360).

Almost surely, 2^25779992 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 25779992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28037760).

25779992 is an abundant number, since it is smaller than the sum of its proper divisors (30295528).

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

25779992 is a wasteful number, since it uses less digits than its factorization.

25779992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6951 (or 6947 counting only the distinct ones).

The product of its digits is 714420, while the sum is 50.

The square root of 25779992 is about 5077.4001221097. The cubic root of 25779992 is about 295.4116325754.

The spelling of 25779992 in words is "twenty-five million, seven hundred seventy-nine thousand, nine hundred ninety-two".