2190418 has 4 divisors (see below), whose sum is σ = 3285630. Its totient is φ = 1095208.

The previous prime is 2190413. The next prime is 2190427. The reversal of 2190418 is 8140912.

It is a happy number.

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., 1912689 + 277729 = 1383^2 + 527^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2190392 and 2190401.

It is not an unprimeable number, because it can be changed into a prime (2190413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 547603 + ... + 547606.

2^2190418 is an apocalyptic number.

2190418 is a deficient number, since it is larger than the sum of its proper divisors (1095212).

2190418 is a wasteful number, since it uses less digits than its factorization.

2190418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095211.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 2190418 is about 1480.0060810686. The cubic root of 2190418 is about 129.8700476534.

The spelling of 2190418 in words is "two million, one hundred ninety thousand, four hundred eighteen".