13730436 has 18 divisors (see below), whose sum is σ = 34707582. Its totient is φ = 4576800.

The previous prime is 13730419. The next prime is 13730501. The reversal of 13730436 is 63403731.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13176900 + 553536 = 3630^2 + 744^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 190665 + ... + 190736.

It is an arithmetic number, because the mean of its divisors is an integer number (1928199).

Almost surely, 2^13730436 is an apocalyptic number.

It is an amenable number.

13730436 is an abundant number, since it is smaller than the sum of its proper divisors (20977146).

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

13730436 is a wasteful number, since it uses less digits than its factorization.

13730436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381411 (or 381406 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 27.

The square root of 13730436 is about 3705.4602952940. The cubic root of 13730436 is about 239.4573154812.

The spelling of 13730436 in words is "thirteen million, seven hundred thirty thousand, four hundred thirty-six".