15490880 has 28 divisors (see below), whose sum is σ = 36888420. Its totient is φ = 6196224.

The previous prime is 15490861. The next prime is 15490883. The reversal of 15490880 is 8809451.

15490880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12222016 + 3268864 = 3496^2 + 1808^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 15490880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15490883) 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, 23885 + ... + 24524.

Almost surely, 2^15490880 is an apocalyptic number.

15490880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15490880 is an abundant number, since it is smaller than the sum of its proper divisors (21397540).

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

15490880 is an equidigital number, since it uses as much as digits as its factorization.

15490880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48426 (or 48416 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 15490880 is about 3935.8455254240. The cubic root of 15490880 is about 249.2826368627.

The spelling of 15490880 in words is "fifteen million, four hundred ninety thousand, eight hundred eighty".