15478868 has 12 divisors (see below), whose sum is σ = 27134772. Its totient is φ = 7726080.

The previous prime is 15478867. The next prime is 15478873. The reversal of 15478868 is 86887451.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8832784 + 6646084 = 2972^2 + 2578^2 .

It is a super-2 number, since 2×15478868² = 479190709122848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15478867) 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, 455 + ... + 5582.

It is an arithmetic number, because the mean of its divisors is an integer number (2261231).

Almost surely, 2^15478868 is an apocalyptic number.

It is an amenable number.

15478868 is a deficient number, since it is larger than the sum of its proper divisors (11655904).

15478868 is a wasteful number, since it uses less digits than its factorization.

15478868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6682 (or 6680 counting only the distinct ones).

The product of its digits is 430080, while the sum is 47.

The square root of 15478868 is about 3934.3192549665. The cubic root of 15478868 is about 249.2181869554.

The spelling of 15478868 in words is "fifteen million, four hundred seventy-eight thousand, eight hundred sixty-eight".