15220880 has 20 divisors (see below), whose sum is σ = 35388732. Its totient is φ = 6088320.

The previous prime is 15220867. The next prime is 15220883. The reversal of 15220880 is 8802251.

It can be written as a sum of positive squares in 2 ways, for example, as 4145296 + 11075584 = 2036^2 + 3328^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (15220883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95051 + ... + 95210.

Almost surely, 2^15220880 is an apocalyptic number.

15220880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15220880 is an abundant number, since it is smaller than the sum of its proper divisors (20167852).

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

15220880 is a wasteful number, since it uses less digits than its factorization.

15220880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190274 (or 190268 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 15220880 is about 3901.3946224395. The cubic root of 15220880 is about 247.8258402628.

The spelling of 15220880 in words is "fifteen million, two hundred twenty thousand, eight hundred eighty".