25564740 has 48 divisors (see below), whose sum is σ = 71934912. Its totient is φ = 6783616.

The previous prime is 25564733. The next prime is 25564793. The reversal of 25564740 is 4746552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12682 + ... + 14558.

It is an arithmetic number, because the mean of its divisors is an integer number (1498644).

Almost surely, 2^25564740 is an apocalyptic number.

25564740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25564740 is an abundant number, since it is smaller than the sum of its proper divisors (46370172).

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

25564740 is a wasteful number, since it uses less digits than its factorization.

25564740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116 (or 2114 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 25564740 is about 5056.1586209295. The cubic root of 25564740 is about 294.5871463133.

The spelling of 25564740 in words is "twenty-five million, five hundred sixty-four thousand, seven hundred forty".