2605990 has 16 divisors (see below), whose sum is σ = 4709520. Its totient is φ = 1038240.

The previous prime is 2605987. The next prime is 2605991. The reversal of 2605990 is 995062.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605991) 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, 3901 + ... + 4519.

It is an arithmetic number, because the mean of its divisors is an integer number (294345).

2^2605990 is an apocalyptic number.

2605990 is a deficient number, since it is larger than the sum of its proper divisors (2103530).

2605990 is a wasteful number, since it uses less digits than its factorization.

2605990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 2605990 is about 1614.3079012382. The cubic root of 2605990 is about 137.6124039544.

The spelling of 2605990 in words is "two million, six hundred five thousand, nine hundred ninety".