15479840 has 24 divisors (see below), whose sum is σ = 36571500. Its totient is φ = 6191872.

The previous prime is 15479839. The next prime is 15479857. The reversal of 15479840 is 4897451.

It can be written as a sum of positive squares in 2 ways, for example, as 15085456 + 394384 = 3884^2 + 628^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15479794 and 15479803.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48215 + ... + 48534.

Almost surely, 2^15479840 is an apocalyptic number.

15479840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15479840 is an abundant number, since it is smaller than the sum of its proper divisors (21091660).

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

15479840 is an equidigital number, since it uses as much as digits as its factorization.

15479840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96764 (or 96756 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 15479840 is about 3934.4427813859. The cubic root of 15479840 is about 249.2234034223.

The spelling of 15479840 in words is "fifteen million, four hundred seventy-nine thousand, eight hundred forty".