13944780 has 36 divisors (see below), whose sum is σ = 42299712. Its totient is φ = 3718560.

The previous prime is 13944773. The next prime is 13944793. The reversal of 13944780 is 8744931.

It is a happy number.

13944780 is a `hidden beast` number, since 139 + 447 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 38556 + ... + 38915.

It is an arithmetic number, because the mean of its divisors is an integer number (1174992).

Almost surely, 2^13944780 is an apocalyptic number.

13944780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13944780 is an abundant number, since it is smaller than the sum of its proper divisors (28354932).

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

13944780 is a wasteful number, since it uses less digits than its factorization.

13944780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77486 (or 77481 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 13944780 is about 3734.2710131966. The cubic root of 13944780 is about 240.6969325619.

The spelling of 13944780 in words is "thirteen million, nine hundred forty-four thousand, seven hundred eighty".