3128530 has 16 divisors (see below), whose sum is σ = 5664024. Its totient is φ = 1244160.

The previous prime is 3128501. The next prime is 3128533. The reversal of 3128530 is 358213.

It can be written as a sum of positive squares in 4 ways, for example, as 2518569 + 609961 = 1587^2 + 781^2 .

It is a super-3 number, since 3×3128530³ = 91863338876023431000, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (3128533) 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, 1120 + ... + 2740.

Almost surely, 2^3128530 is an apocalyptic number.

3128530 is a deficient number, since it is larger than the sum of its proper divisors (2535494).

3128530 is a wasteful number, since it uses less digits than its factorization.

3128530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 3128530 is about 1768.7651059426. The cubic root of 3128530 is about 146.2559157030.

It can be divided in two parts, 31 and 28530, that added together give a 4-th power (28561 = 13⁴).

The spelling of 3128530 in words is "three million, one hundred twenty-eight thousand, five hundred thirty".