3120720 has 40 divisors (see below), whose sum is σ = 9674976. Its totient is φ = 832128.

The previous prime is 3120713. The next prime is 3120727. The reversal of 3120720 is 270213.

It is an interprime number because it is at equal distance from previous prime (3120713) and next prime (3120727).

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 (15).

It is a self number, because there is not a number n which added to its sum of digits gives 3120720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3120727) 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, 6262 + ... + 6741.

Almost surely, 2^3120720 is an apocalyptic number.

3120720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3120720 is an abundant number, since it is smaller than the sum of its proper divisors (6554256).

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

3120720 is a wasteful number, since it uses less digits than its factorization.

3120720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13019 (or 13013 counting only the distinct ones).

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

The square root of 3120720 is about 1766.5559713748. Note that the first 3 decimals coincide. The cubic root of 3120720 is about 146.1341108376.

Adding to 3120720 its reverse (270213), we get a palindrome (3390933).

The spelling of 3120720 in words is "three million, one hundred twenty thousand, seven hundred twenty".