13239930 has 64 divisors (see below), whose sum is σ = 35365248. Its totient is φ = 3144960.

The previous prime is 13239913. The next prime is 13239931. The reversal of 13239930 is 3993231.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13239931) 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 31 ways as a sum of consecutive naturals, for example, 17112 + ... + 17868.

It is an arithmetic number, because the mean of its divisors is an integer number (552582).

Almost surely, 2^13239930 is an apocalyptic number.

13239930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13239930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17682624).

13239930 is an abundant number, since it is smaller than the sum of its proper divisors (22125318).

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

13239930 is a wasteful number, since it uses less digits than its factorization.

13239930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 13239930 is about 3638.6714608494. The cubic root of 13239930 is about 236.5712128011.

The spelling of 13239930 in words is "thirteen million, two hundred thirty-nine thousand, nine hundred thirty".