25497864 has 48 divisors (see below), whose sum is σ = 78923520. Its totient is φ = 7284960.

The previous prime is 25497863. The next prime is 25497881. The reversal of 25497864 is 46879452.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25497863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24792 + ... + 25799.

It is an arithmetic number, because the mean of its divisors is an integer number (1644240).

Almost surely, 2^25497864 is an apocalyptic number.

25497864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25497864 is an abundant number, since it is smaller than the sum of its proper divisors (53425656).

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

25497864 is a wasteful number, since it uses less digits than its factorization.

25497864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50610 (or 50603 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 25497864 is about 5049.5409692367. The cubic root of 25497864 is about 294.3300472286.

The spelling of 25497864 in words is "twenty-five million, four hundred ninety-seven thousand, eight hundred sixty-four".