2007990 has 80 divisors (see below), whose sum is σ = 5627952. Its totient is φ = 513216.

The previous prime is 2007979. The next prime is 2008003. The reversal of 2007990 is 997002.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 29937 + ... + 30003.

2^2007990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2007990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2813976).

2007990 is an abundant number, since it is smaller than the sum of its proper divisors (3619962).

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

2007990 is a wasteful number, since it uses less digits than its factorization.

2007990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 2007990 is about 1417.0356382251. The cubic root of 2007990 is about 126.1596615442.

The spelling of 2007990 in words is "two million, seven thousand, nine hundred ninety".