15550880 has 48 divisors (see below), whose sum is σ = 37213344. Its totient is φ = 6140160.

The previous prime is 15550877. The next prime is 15550897. The reversal of 15550880 is 8805551.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12695 + ... + 13865.

It is an arithmetic number, because the mean of its divisors is an integer number (775278).

Almost surely, 2^15550880 is an apocalyptic number.

15550880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15550880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18606672).

15550880 is an abundant number, since it is smaller than the sum of its proper divisors (21662464).

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

15550880 is a wasteful number, since it uses less digits than its factorization.

15550880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269 (or 1261 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 32.

The square root of 15550880 is about 3943.4604093359. The cubic root of 15550880 is about 249.6040666114.

The spelling of 15550880 in words is "fifteen million, five hundred fifty thousand, eight hundred eighty".