13139388 has 24 divisors (see below), whose sum is σ = 34065360. Its totient is φ = 4379760.

The previous prime is 13139387. The next prime is 13139411. The reversal of 13139388 is 88393131.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13139387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60723 + ... + 60938.

It is an arithmetic number, because the mean of its divisors is an integer number (1419390).

Almost surely, 2^13139388 is an apocalyptic number.

13139388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13139388 is an abundant number, since it is smaller than the sum of its proper divisors (20925972).

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

13139388 is a wasteful number, since it uses less digits than its factorization.

13139388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121674 (or 121666 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 13139388 is about 3624.8293752948. The cubic root of 13139388 is about 235.9708620542.

It can be divided in two parts, 1313 and 9388, that added together give a palindrome (10701).

The spelling of 13139388 in words is "thirteen million, one hundred thirty-nine thousand, three hundred eighty-eight".