15638648 has 16 divisors (see below), whose sum is σ = 29474280. Its totient is φ = 7778848.

The previous prime is 15638647. The next prime is 15638659. The reversal of 15638648 is 84683651.

15638648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15638648² = 489134622535808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15638641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3386 + ... + 6537.

Almost surely, 2^15638648 is an apocalyptic number.

It is an amenable number.

15638648 is a deficient number, since it is larger than the sum of its proper divisors (13835632).

15638648 is a wasteful number, since it uses less digits than its factorization.

15638648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10126 (or 10122 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 15638648 is about 3954.5730490155. The cubic root of 15638648 is about 250.0727681505.

The spelling of 15638648 in words is "fifteen million, six hundred thirty-eight thousand, six hundred forty-eight".