2789990 has 16 divisors (see below), whose sum is σ = 5739552. Its totient is φ = 956544.

The previous prime is 2789951. The next prime is 2789993. The reversal of 2789990 is 999872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2789993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19859 + ... + 19998.

It is an arithmetic number, because the mean of its divisors is an integer number (358722).

2^2789990 is an apocalyptic number.

2789990 is an abundant number, since it is smaller than the sum of its proper divisors (2949562).

2789990 is a wasteful number, since it uses less digits than its factorization.

2789990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39871.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 2789990 is about 1670.3263154246. The cubic root of 2789990 is about 140.7778134700. Note that the first 3 decimals are identical.

The spelling of 2789990 in words is "two million, seven hundred eighty-nine thousand, nine hundred ninety".