13700720 has 40 divisors (see below), whose sum is σ = 34752240. Its totient is φ = 4981760.

The previous prime is 13700711. The next prime is 13700723. The reversal of 13700720 is 2700731.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13700692 and 13700701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13700723) 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, 6905 + ... + 8664.

It is an arithmetic number, because the mean of its divisors is an integer number (868806).

Almost surely, 2^13700720 is an apocalyptic number.

13700720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13700720 is an abundant number, since it is smaller than the sum of its proper divisors (21051520).

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

13700720 is a wasteful number, since it uses less digits than its factorization.

13700720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15593 (or 15587 counting only the distinct ones).

The product of its (nonzero) digits is 294, while the sum is 20.

The square root of 13700720 is about 3701.4483651673. The cubic root of 13700720 is about 239.2844427687.

The spelling of 13700720 in words is "thirteen million, seven hundred thousand, seven hundred twenty".