3120280 has 16 divisors (see below), whose sum is σ = 7020720. Its totient is φ = 1248096.

The previous prime is 3120277. The next prime is 3120281. The reversal of 3120280 is 820213.

It is a happy number.

It is a super-2 number, since 2×3120280² = 19472294556800, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3120281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38964 + ... + 39043.

It is an arithmetic number, because the mean of its divisors is an integer number (438795).

Almost surely, 2^3120280 is an apocalyptic number.

It is an amenable number.

3120280 is an abundant number, since it is smaller than the sum of its proper divisors (3900440).

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

3120280 is a wasteful number, since it uses less digits than its factorization.

3120280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78018 (or 78014 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 3120280 is about 1766.4314308798. The cubic root of 3120280 is about 146.1272425475.

Adding to 3120280 its reverse (820213), we get a palindrome (3940493).

The spelling of 3120280 in words is "three million, one hundred twenty thousand, two hundred eighty".