13439772 has 18 divisors (see below), whose sum is σ = 33972848. Its totient is φ = 4479912.

The previous prime is 13439761. The next prime is 13439773. The reversal of 13439772 is 27793431.

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

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 373327 = 13439772 / (1 + 3 + 4 + 3 + 9 + 7 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13439773) 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 5 ways as a sum of consecutive naturals, for example, 186628 + ... + 186699.

Almost surely, 2^13439772 is an apocalyptic number.

13439772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13439772 is an abundant number, since it is smaller than the sum of its proper divisors (20533076).

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

13439772 is a wasteful number, since it uses less digits than its factorization.

13439772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373337 (or 373332 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 13439772 is about 3666.0294597834. The cubic root of 13439772 is about 237.7555336444.

The spelling of 13439772 in words is "thirteen million, four hundred thirty-nine thousand, seven hundred seventy-two".