13557730 has 16 divisors (see below), whose sum is σ = 24447744. Its totient is φ = 5413360.

The previous prime is 13557727. The next prime is 13557749. The reversal of 13557730 is 3775531.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13557692 and 13557701.

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, 7845 + ... + 9415.

It is an arithmetic number, because the mean of its divisors is an integer number (1527984).

Almost surely, 2^13557730 is an apocalyptic number.

13557730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13557730 is a deficient number, since it is larger than the sum of its proper divisors (10890014).

13557730 is a wasteful number, since it uses less digits than its factorization.

13557730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441.

The product of its (nonzero) digits is 11025, while the sum is 31.

The square root of 13557730 is about 3682.0822913129. The cubic root of 13557730 is about 238.4490849976.

The spelling of 13557730 in words is "thirteen million, five hundred fifty-seven thousand, seven hundred thirty".