2190402 has 24 divisors (see below), whose sum is σ = 4922736. Its totient is φ = 729972.

The previous prime is 2190389. The next prime is 2190403. The reversal of 2190402 is 2040912.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2190403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1768 + ... + 2739.

It is an arithmetic number, because the mean of its divisors is an integer number (205114).

2^2190402 is an apocalyptic number.

2190402 is an abundant number, since it is smaller than the sum of its proper divisors (2732334).

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

2190402 is an equidigital number, since it uses as much as digits as its factorization.

2190402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4524 (or 4512 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2190402 is about 1480.0006756755. Note that the first 3 decimals coincide. The cubic root of 2190402 is about 129.8697314389.

The spelling of 2190402 in words is "two million, one hundred ninety thousand, four hundred two".