25780392 has 96 divisors (see below), whose sum is σ = 78043680. Its totient is φ = 7620480.

The previous prime is 25780367. The next prime is 25780409. The reversal of 25780392 is 29308752.

It is a happy number.

It is a super-2 number, since 2×25780392² = 1329257223347328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33678 + ... + 34434.

It is an arithmetic number, because the mean of its divisors is an integer number (812955).

Almost surely, 2^25780392 is an apocalyptic number.

25780392 is a gapful number since it is divisible by the number (22) 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 25780392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39021840).

25780392 is an abundant number, since it is smaller than the sum of its proper divisors (52263288).

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

25780392 is a wasteful number, since it uses less digits than its factorization.

25780392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 25780392 is about 5077.4395121951. The cubic root of 25780392 is about 295.4131604275.

The spelling of 25780392 in words is "twenty-five million, seven hundred eighty thousand, three hundred ninety-two".