13139766 has 32 divisors (see below), whose sum is σ = 29685600. Its totient is φ = 4307040.

The previous prime is 13139741. The next prime is 13139767. The reversal of 13139766 is 66793131.

It is a self number, because there is not a number n which added to its sum of digits gives 13139766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13139767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1300 + ... + 5288.

It is an arithmetic number, because the mean of its divisors is an integer number (927675).

Almost surely, 2^13139766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13139766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14842800).

13139766 is an abundant number, since it is smaller than the sum of its proper divisors (16545834).

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

13139766 is a wasteful number, since it uses less digits than its factorization.

13139766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4061 (or 4055 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 13139766 is about 3624.8815153050. The cubic root of 13139766 is about 235.9731248722.

The spelling of 13139766 in words is "thirteen million, one hundred thirty-nine thousand, seven hundred sixty-six".