13239780 has 24 divisors (see below), whose sum is σ = 37071552. Its totient is φ = 3530592.

The previous prime is 13239773. The next prime is 13239781. The reversal of 13239780 is 8793231.

It is not an unprimeable number, because it can be changed into a prime (13239781) 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, 110272 + ... + 110391.

It is an arithmetic number, because the mean of its divisors is an integer number (1544648).

Almost surely, 2^13239780 is an apocalyptic number.

13239780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13239780 is an abundant number, since it is smaller than the sum of its proper divisors (23831772).

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

13239780 is a wasteful number, since it uses less digits than its factorization.

13239780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220675 (or 220673 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 13239780 is about 3638.6508488724. The cubic root of 13239780 is about 236.5703193972.

The spelling of 13239780 in words is "thirteen million, two hundred thirty-nine thousand, seven hundred eighty".