2118390 has 32 divisors (see below), whose sum is σ = 5122656. Its totient is φ = 560640.

The previous prime is 2118377. The next prime is 2118397. The reversal of 2118390 is 938112.

It is a self number, because there is not a number n which added to its sum of digits gives 2118390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118397) 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, 7084 + ... + 7376.

It is an arithmetic number, because the mean of its divisors is an integer number (160083).

2^2118390 is an apocalyptic number.

2118390 is an abundant number, since it is smaller than the sum of its proper divisors (3004266).

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

2118390 is a wasteful number, since it uses less digits than its factorization.

2118390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 2118390 is about 1455.4689965781. The cubic root of 2118390 is about 128.4306377719.

The spelling of 2118390 in words is "two million, one hundred eighteen thousand, three hundred ninety".