3115720 has 16 divisors (see below), whose sum is σ = 7010460. Its totient is φ = 1246272.

The previous prime is 3115667. The next prime is 3115727. The reversal of 3115720 is 275113.

3115720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3076516 + 39204 = 1754^2 + 198^2 .

It is a super-2 number, since 2×3115720² = 19415422236800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3115727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38907 + ... + 38986.

Almost surely, 2^3115720 is an apocalyptic number.

It is an amenable number.

3115720 is an abundant number, since it is smaller than the sum of its proper divisors (3894740).

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

3115720 is a wasteful number, since it uses less digits than its factorization.

3115720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77904 (or 77900 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 3115720 is about 1765.1402210589. The cubic root of 3115720 is about 146.0560240364.

It can be divided in two parts, 31 and 15720, that added together give a palindrome (15751).

The spelling of 3115720 in words is "three million, one hundred fifteen thousand, seven hundred twenty".