13839870 has 64 divisors (see below), whose sum is σ = 38382336. Its totient is φ = 3156480.

The previous prime is 13839869. The next prime is 13839871. The reversal of 13839870 is 7893831.

It is an interprime number because it is at equal distance from previous prime (13839869) and next prime (13839871).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13839871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4377 + ... + 6843.

It is an arithmetic number, because the mean of its divisors is an integer number (599724).

Almost surely, 2^13839870 is an apocalyptic number.

13839870 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 13839870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19191168).

13839870 is an abundant number, since it is smaller than the sum of its proper divisors (24542466).

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

13839870 is a wasteful number, since it uses less digits than its factorization.

13839870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2505.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 13839870 is about 3720.1975753984. The cubic root of 13839870 is about 240.0918051559.

The spelling of 13839870 in words is "thirteen million, eight hundred thirty-nine thousand, eight hundred seventy".