13991064 has 16 divisors (see below), whose sum is σ = 34977720. Its totient is φ = 4663680.

The previous prime is 13991063. The next prime is 13991071. The reversal of 13991064 is 46019931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13991063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291457 + ... + 291504.

Almost surely, 2^13991064 is an apocalyptic number.

It is an amenable number.

13991064 is an abundant number, since it is smaller than the sum of its proper divisors (20986656).

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

13991064 is a wasteful number, since it uses less digits than its factorization.

13991064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582970 (or 582966 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 13991064 is about 3740.4630729363. The cubic root of 13991064 is about 240.9629368576.

The spelling of 13991064 in words is "thirteen million, nine hundred ninety-one thousand, sixty-four".