13620730 has 16 divisors (see below), whose sum is σ = 24562440. Its totient is φ = 5438272.

The previous prime is 13620727. The next prime is 13620781. The reversal of 13620730 is 3702631.

It can be written as a sum of positive squares in 4 ways, for example, as 8767521 + 4853209 = 2961^2 + 2203^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7116 + ... + 8824.

Almost surely, 2^13620730 is an apocalyptic number.

13620730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13620730 is a deficient number, since it is larger than the sum of its proper divisors (10941710).

13620730 is a wasteful number, since it uses less digits than its factorization.

13620730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 13620730 is about 3690.6273179502. The cubic root of 13620730 is about 238.8178557710.

The spelling of 13620730 in words is "thirteen million, six hundred twenty thousand, seven hundred thirty".