13639794 has 16 divisors (see below), whose sum is σ = 31176768. Its totient is φ = 3897072.

The previous prime is 13639789. The next prime is 13639799. The reversal of 13639794 is 49793631.

It is an interprime number because it is at equal distance from previous prime (13639789) and next prime (13639799).

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 324757 = 13639794 / (1 + 3 + 6 + 3 + 9 + 7 + 9 + 4).

It is not an unprimeable number, because it can be changed into a prime (13639799) 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, 162337 + ... + 162420.

It is an arithmetic number, because the mean of its divisors is an integer number (1948548).

Almost surely, 2^13639794 is an apocalyptic number.

13639794 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

13639794 is an abundant number, since it is smaller than the sum of its proper divisors (17536974).

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

13639794 is a wasteful number, since it uses less digits than its factorization.

13639794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324769.

The product of its digits is 122472, while the sum is 42.

The square root of 13639794 is about 3693.2091736050. The cubic root of 13639794 is about 238.9292228113.

The spelling of 13639794 in words is "thirteen million, six hundred thirty-nine thousand, seven hundred ninety-four".