15320880 has 160 divisors (see below), whose sum is σ = 54371520. Its totient is φ = 3962880.

The previous prime is 15320867. The next prime is 15320881. The reversal of 15320880 is 8802351.

It is a happy number.

15320880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

15320880 is a nontrivial binomial coefficient, being equal to C(5536, 2).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (15320881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88474 + ... + 88646.

It is an arithmetic number, because the mean of its divisors is an integer number (339822).

Almost surely, 2^15320880 is an apocalyptic number.

15320880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15320880 is the 5535-th triangular number and also the 2768-th hexagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15320880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27185760).

15320880 is an abundant number, since it is smaller than the sum of its proper divisors (39050640).

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

15320880 is a wasteful number, since it uses less digits than its factorization.

15320880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 15320880 is about 3914.1895712906. The cubic root of 15320880 is about 248.3673881899.

The spelling of 15320880 in words is "fifteen million, three hundred twenty thousand, eight hundred eighty".