25647472 has 40 divisors (see below), whose sum is σ = 51103872. Its totient is φ = 12465600.

The previous prime is 25647469. The next prime is 25647481. The reversal of 25647472 is 27474652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121447 + ... + 121657.

Almost surely, 2^25647472 is an apocalyptic number.

It is an amenable number.

25647472 is a deficient number, since it is larger than the sum of its proper divisors (25456400).

25647472 is a wasteful number, since it uses less digits than its factorization.

25647472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 391 counting only the distinct ones).

The product of its digits is 94080, while the sum is 37.

The square root of 25647472 is about 5064.3333223634. Note that the first 4 decimals coincide. The cubic root of 25647472 is about 294.9045827576.

The spelling of 25647472 in words is "twenty-five million, six hundred forty-seven thousand, four hundred seventy-two".