2918506 has 4 divisors (see below), whose sum is σ = 4377762. Its totient is φ = 1459252.

The previous prime is 2918501. The next prime is 2918507. The reversal of 2918506 is 6058192.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2692881 + 225625 = 1641^2 + 475^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2918501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 729625 + ... + 729628.

2^2918506 is an apocalyptic number.

2918506 is a deficient number, since it is larger than the sum of its proper divisors (1459256).

2918506 is a wasteful number, since it uses less digits than its factorization.

2918506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459255.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 2918506 is about 1708.3635444483. The cubic root of 2918506 is about 142.9070091629.

The spelling of 2918506 in words is "two million, nine hundred eighteen thousand, five hundred six".