25641982 has 8 divisors (see below), whose sum is σ = 40487400. Its totient is φ = 12146184.

The previous prime is 25641971. The next prime is 25641989. The reversal of 25641982 is 28914652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×25641982² = 1315022481776648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25641989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337357 + ... + 337432.

It is an arithmetic number, because the mean of its divisors is an integer number (5060925).

Almost surely, 2^25641982 is an apocalyptic number.

25641982 is a deficient number, since it is larger than the sum of its proper divisors (14845418).

25641982 is a wasteful number, since it uses less digits than its factorization.

25641982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674810.

The product of its digits is 34560, while the sum is 37.

The square root of 25641982 is about 5063.7912674201. The cubic root of 25641982 is about 294.8835392061.

The spelling of 25641982 in words is "twenty-five million, six hundred forty-one thousand, nine hundred eighty-two".