25489812 has 24 divisors (see below), whose sum is σ = 61395712. Its totient is φ = 8222400.

The previous prime is 25489733. The next prime is 25489813. The reversal of 25489812 is 21898452.

25489812 = 189² + 190² + ... + 436².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25489813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33889 + ... + 34632.

Almost surely, 2^25489812 is an apocalyptic number.

It is an amenable number.

25489812 is an abundant number, since it is smaller than the sum of its proper divisors (35905900).

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

25489812 is a wasteful number, since it uses less digits than its factorization.

25489812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68559 (or 68557 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The square root of 25489812 is about 5048.7436060866. The cubic root of 25489812 is about 294.2990616912.

The spelling of 25489812 in words is "twenty-five million, four hundred eighty-nine thousand, eight hundred twelve".