13730440 has 16 divisors (see below), whose sum is σ = 30893580. Its totient is φ = 5492160.

The previous prime is 13730419. The next prime is 13730501. The reversal of 13730440 is 4403731.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12916836 + 813604 = 3594^2 + 902^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171591 + ... + 171670.

Almost surely, 2^13730440 is an apocalyptic number.

13730440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13730440 is an abundant number, since it is smaller than the sum of its proper divisors (17163140).

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

13730440 is a wasteful number, since it uses less digits than its factorization.

13730440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343272 (or 343268 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 13730440 is about 3705.4608350379. The cubic root of 13730440 is about 239.4573387344.

The spelling of 13730440 in words is "thirteen million, seven hundred thirty thousand, four hundred forty".