13505860 has 24 divisors (see below), whose sum is σ = 28788480. Its totient is φ = 5321184.

The previous prime is 13505857. The next prime is 13505897. The reversal of 13505860 is 6850531.

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, 3700 + ... + 6379.

It is an arithmetic number, because the mean of its divisors is an integer number (1199520).

Almost surely, 2^13505860 is an apocalyptic number.

13505860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13505860 is an abundant number, since it is smaller than the sum of its proper divisors (15282620).

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

13505860 is a wasteful number, since it uses less digits than its factorization.

13505860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10155 (or 10153 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 13505860 is about 3675.0319726500. The cubic root of 13505860 is about 238.1446052935.

It can be divided in two parts, 13505 and 860, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 13505860 in words is "thirteen million, five hundred five thousand, eight hundred sixty".