3138530 has 8 divisors (see below), whose sum is σ = 5649372. Its totient is φ = 1255408.

The previous prime is 3138529. The next prime is 3138539. The reversal of 3138530 is 358313.

It can be written as a sum of positive squares in 2 ways, for example, as 2647129 + 491401 = 1627^2 + 701^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 3138496 and 3138505.

It is not an unprimeable number, because it can be changed into a prime (3138539) 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, 156917 + ... + 156936.

Almost surely, 2^3138530 is an apocalyptic number.

3138530 is a deficient number, since it is larger than the sum of its proper divisors (2510842).

3138530 is a wasteful number, since it uses less digits than its factorization.

3138530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313860.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 3138530 is about 1771.5896816137. The cubic root of 3138530 is about 146.4115802499.

The spelling of 3138530 in words is "three million, one hundred thirty-eight thousand, five hundred thirty".