2045990 has 8 divisors (see below), whose sum is σ = 3682800. Its totient is φ = 818392.

The previous prime is 2045987. The next prime is 2045999. The reversal of 2045990 is 995402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102290 + ... + 102309.

It is an arithmetic number, because the mean of its divisors is an integer number (460350).

2^2045990 is an apocalyptic number.

2045990 is a deficient number, since it is larger than the sum of its proper divisors (1636810).

2045990 is a wasteful number, since it uses less digits than its factorization.

2045990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204606.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 2045990 is about 1430.3810681074. The cubic root of 2045990 is about 126.9505252967.

The spelling of 2045990 in words is "two million, forty-five thousand, nine hundred ninety".