10320720 has 40 divisors (see below), whose sum is σ = 31994976. Its totient is φ = 2752128.

The previous prime is 10320697. The next prime is 10320757. The reversal of 10320720 is 2702301.

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

It is a super-2 number, since 2×10320720² = 213034522636800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 10320720.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 21262 + ... + 21741.

Almost surely, 2^10320720 is an apocalyptic number.

10320720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10320720 is an abundant number, since it is smaller than the sum of its proper divisors (21674256).

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

10320720 is a wasteful number, since it uses less digits than its factorization.

10320720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43019 (or 43013 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 10320720 is about 3212.5877419924. The cubic root of 10320720 is about 217.7225097693.

The spelling of 10320720 in words is "ten million, three hundred twenty thousand, seven hundred twenty".