25438966 has 32 divisors (see below), whose sum is σ = 45849600. Its totient is φ = 10349856.

The previous prime is 25438961. The next prime is 25438969. The reversal of 25438966 is 66983452.

It is a super-2 number, since 2×25438966² = 1294281982298312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25438961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63880 + ... + 64276.

It is an arithmetic number, because the mean of its divisors is an integer number (1432800).

Almost surely, 2^25438966 is an apocalyptic number.

25438966 is a deficient number, since it is larger than the sum of its proper divisors (20410634).

25438966 is a wasteful number, since it uses less digits than its factorization.

25438966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628.

The product of its digits is 311040, while the sum is 43.

The square root of 25438966 is about 5043.7055822084. The cubic root of 25438966 is about 294.1032463208.

The spelling of 25438966 in words is "twenty-five million, four hundred thirty-eight thousand, nine hundred sixty-six".