13439880 has 96 divisors (see below), whose sum is σ = 44904600. Its totient is φ = 3483648.

The previous prime is 13439879. The next prime is 13439891. The reversal of 13439880 is 8893431.

It can be written as a sum of positive squares in 4 ways, for example, as 11985444 + 1454436 = 3462^2 + 1206^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12816 + ... + 13824.

Almost surely, 2^13439880 is an apocalyptic number.

13439880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13439880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22452300).

13439880 is an abundant number, since it is smaller than the sum of its proper divisors (31464720).

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

13439880 is a wasteful number, since it uses less digits than its factorization.

13439880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063 (or 1056 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 13439880 is about 3666.0441895864. The cubic root of 13439880 is about 237.7561704987.

The spelling of 13439880 in words is "thirteen million, four hundred thirty-nine thousand, eight hundred eighty".