2659990 has 16 divisors (see below), whose sum is σ = 5069952. Its totient is φ = 1001344.

The previous prime is 2659963. The next prime is 2659999. The reversal of 2659990 is 999562.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2659999) 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, 7654 + ... + 7993.

It is an arithmetic number, because the mean of its divisors is an integer number (316872).

2^2659990 is an apocalyptic number.

2659990 is a deficient number, since it is larger than the sum of its proper divisors (2409962).

2659990 is a wasteful number, since it uses less digits than its factorization.

2659990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15671.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 2659990 is about 1630.9475773304. The cubic root of 2659990 is about 138.5564245935.

The spelling of 2659990 in words is "two million, six hundred fifty-nine thousand, nine hundred ninety".