2639390 has 32 divisors (see below), whose sum is σ = 5201280. Its totient is φ = 958464.

The previous prime is 2639389. The next prime is 2639393. The reversal of 2639390 is 939362.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10142 + ... + 10398.

It is an arithmetic number, because the mean of its divisors is an integer number (162540).

2^2639390 is an apocalyptic number.

2639390 is a deficient number, since it is larger than the sum of its proper divisors (2561890).

2639390 is a wasteful number, since it uses less digits than its factorization.

2639390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356.

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 2639390 is about 1624.6199555588. The cubic root of 2639390 is about 138.1978189364.

The spelling of 2639390 in words is "two million, six hundred thirty-nine thousand, three hundred ninety".