2639090 has 8 divisors (see below), whose sum is σ = 4750380. Its totient is φ = 1055632.

The previous prime is 2639083. The next prime is 2639093. The reversal of 2639090 is 909362.

It can be written as a sum of positive squares in 2 ways, for example, as 2627641 + 11449 = 1621^2 + 107^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2639093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131945 + ... + 131964.

2^2639090 is an apocalyptic number.

2639090 is a deficient number, since it is larger than the sum of its proper divisors (2111290).

2639090 is a wasteful number, since it uses less digits than its factorization.

2639090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263916.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 2639090 is about 1624.5276236494. The cubic root of 2639090 is about 138.1925827623.

The spelling of 2639090 in words is "two million, six hundred thirty-nine thousand, ninety".