25578982 has 32 divisors (see below), whose sum is σ = 47736864. Its totient is φ = 10099200.

The previous prime is 25578977. The next prime is 25578983. The reversal of 25578982 is 28987552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25578983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2232 + ... + 7492.

It is an arithmetic number, because the mean of its divisors is an integer number (1491777).

Almost surely, 2^25578982 is an apocalyptic number.

25578982 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25578982 is a deficient number, since it is larger than the sum of its proper divisors (22157882).

25578982 is a wasteful number, since it uses less digits than its factorization.

25578982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5304.

The product of its digits is 403200, while the sum is 46.

The square root of 25578982 is about 5057.5668062815. The cubic root of 25578982 is about 294.6418405429.

The spelling of 25578982 in words is "twenty-five million, five hundred seventy-eight thousand, nine hundred eighty-two".