13749660 has 36 divisors (see below), whose sum is σ = 41707848. Its totient is φ = 3666528.

The previous prime is 13749649. The next prime is 13749661. The reversal of 13749660 is 6694731.

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

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13749661) 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 11 ways as a sum of consecutive naturals, for example, 38014 + ... + 38373.

Almost surely, 2^13749660 is an apocalyptic number.

13749660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13749660 is an abundant number, since it is smaller than the sum of its proper divisors (27958188).

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

13749660 is a wasteful number, since it uses less digits than its factorization.

13749660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76402 (or 76397 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 13749660 is about 3708.0533976738. The cubic root of 13749660 is about 239.5690181911.

The spelling of 13749660 in words is "thirteen million, seven hundred forty-nine thousand, six hundred sixty".