25128664 has 16 divisors (see below), whose sum is σ = 51399720. Its totient is φ = 11422080.

The previous prime is 25128647. The next prime is 25128667. The reversal of 25128664 is 46682152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25128667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142689 + ... + 142864.

Almost surely, 2^25128664 is an apocalyptic number.

It is an amenable number.

25128664 is an abundant number, since it is smaller than the sum of its proper divisors (26271056).

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

25128664 is a wasteful number, since it uses less digits than its factorization.

25128664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285570 (or 285566 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 25128664 is about 5012.8498880377. The cubic root of 25128664 is about 292.9025368233.

The spelling of 25128664 in words is "twenty-five million, one hundred twenty-eight thousand, six hundred sixty-four".