3121818 has 32 divisors (see below), whose sum is σ = 7188480. Its totient is φ = 885360.

The previous prime is 3121817. The next prime is 3121831. The reversal of 3121818 is 8181213.

3121818 is a modest number, since divided by 1818 gives 312 as remainder.

It is not an unprimeable number, because it can be changed into a prime (3121817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9883 + ... + 10193.

It is an arithmetic number, because the mean of its divisors is an integer number (224640).

Almost surely, 2^3121818 is an apocalyptic number.

3121818 is an abundant number, since it is smaller than the sum of its proper divisors (4066662).

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

3121818 is a wasteful number, since it uses less digits than its factorization.

3121818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562.

The product of its digits is 384, while the sum is 24.

The square root of 3121818 is about 1766.8667182332. The cubic root of 3121818 is about 146.1512475282.

The spelling of 3121818 in words is "three million, one hundred twenty-one thousand, eight hundred eighteen".