13739240 has 16 divisors (see below), whose sum is σ = 30913380. Its totient is φ = 5495680.

The previous prime is 13739189. The next prime is 13739249. The reversal of 13739240 is 4293731.

It can be written as a sum of positive squares in 2 ways, for example, as 12859396 + 879844 = 3586^2 + 938^2 .

It is not an unprimeable number, because it can be changed into a prime (13739249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171701 + ... + 171780.

Almost surely, 2^13739240 is an apocalyptic number.

13739240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13739240 is an abundant number, since it is smaller than the sum of its proper divisors (17174140).

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

13739240 is a wasteful number, since it uses less digits than its factorization.

13739240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343492 (or 343488 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 13739240 is about 3706.6480814882. The cubic root of 13739240 is about 239.5084848147.

The spelling of 13739240 in words is "thirteen million, seven hundred thirty-nine thousand, two hundred forty".