15555480 has 32 divisors (see below), whose sum is σ = 46666800. Its totient is φ = 4148096.

The previous prime is 15555479. The next prime is 15555511. The reversal of 15555480 is 8455551.

It is a congruent number.

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, 64695 + ... + 64934.

Almost surely, 2^15555480 is an apocalyptic number.

15555480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15555480 is an abundant number, since it is smaller than the sum of its proper divisors (31111320).

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

15555480 is a wasteful number, since it uses less digits than its factorization.

15555480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129643 (or 129639 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 33.

The square root of 15555480 is about 3944.0436103066. The cubic root of 15555480 is about 249.6286754119.

The spelling of 15555480 in words is "fifteen million, five hundred fifty-five thousand, four hundred eighty".