2638990 has 8 divisors (see below), whose sum is σ = 4750200. Its totient is φ = 1055592.

The previous prime is 2638973. The next prime is 2639041. The reversal of 2638990 is 998362.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131940 + ... + 131959.

It is an arithmetic number, because the mean of its divisors is an integer number (593775).

2^2638990 is an apocalyptic number.

2638990 is a deficient number, since it is larger than the sum of its proper divisors (2111210).

2638990 is a wasteful number, since it uses less digits than its factorization.

2638990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263906.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 2638990 is about 1624.4968451801. The cubic root of 2638990 is about 138.1908372828.

The spelling of 2638990 in words is "two million, six hundred thirty-eight thousand, nine hundred ninety".