3900026639 has 4 divisors (see below), whose sum is σ = 3904766256. Its totient is φ = 3895287024.

The previous prime is 3900026597. The next prime is 3900026653. The reversal of 3900026639 is 9366200093.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3900026639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3900026839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2368574 + ... + 2370219.

It is an arithmetic number, because the mean of its divisors is an integer number (976191564).

Almost surely, 2^3900026639 is an apocalyptic number.

3900026639 is a deficient number, since it is larger than the sum of its proper divisors (4739617).

3900026639 is an equidigital number, since it uses as much as digits as its factorization.

3900026639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4739616.

The product of its (nonzero) digits is 52488, while the sum is 38.

The square root of 3900026639 is about 62450.1932663142. The cubic root of 3900026639 is about 1574.0645005044.

The spelling of 3900026639 in words is "three billion, nine hundred million, twenty-six thousand, six hundred thirty-nine".