2990890638 has 12 divisors (see below), whose sum is σ = 6480263088. Its totient is φ = 996963540.

The previous prime is 2990890621. The next prime is 2990890697. The reversal of 2990890638 is 8360980992.

2990890638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83080278 + ... + 83080313.

It is an arithmetic number, because the mean of its divisors is an integer number (540021924).

Almost surely, 2^2990890638 is an apocalyptic number.

2990890638 is an abundant number, since it is smaller than the sum of its proper divisors (3489372450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2990890638 is a wasteful number, since it uses less digits than its factorization.

2990890638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166160599 (or 166160596 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The square root of 2990890638 is about 54689.0358115774. The cubic root of 2990890638 is about 1440.7883154713.

The spelling of 2990890638 in words is "two billion, nine hundred ninety million, eight hundred ninety thousand, six hundred thirty-eight".