15505480 has 32 divisors (see below), whose sum is σ = 35006400. Its totient is φ = 6181056.

The previous prime is 15505453. The next prime is 15505493. The reversal of 15505480 is 8450551.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17119 + ... + 18001.

It is an arithmetic number, because the mean of its divisors is an integer number (1093950).

Almost surely, 2^15505480 is an apocalyptic number.

15505480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15505480 is an abundant number, since it is smaller than the sum of its proper divisors (19500920).

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

15505480 is a wasteful number, since it uses less digits than its factorization.

15505480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333 (or 1329 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 15505480 is about 3937.6998361988. The cubic root of 15505480 is about 249.3609277386.

The spelling of 15505480 in words is "fifteen million, five hundred five thousand, four hundred eighty".