290805907668 has 24 divisors (see below), whose sum is σ = 708049167168. Its totient is φ = 92720724096.

The previous prime is 290805907657. The next prime is 290805907669. The reversal of 290805907668 is 866709508092.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290805907669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526822021 + ... + 526822572.

It is an arithmetic number, because the mean of its divisors is an integer number (29502048632).

Almost surely, 2^290805907668 is an apocalyptic number.

It is an amenable number.

290805907668 is an abundant number, since it is smaller than the sum of its proper divisors (417243259500).

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

290805907668 is a wasteful number, since it uses less digits than its factorization.

290805907668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053644623 (or 1053644621 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 290805907668 in words is "two hundred ninety billion, eight hundred five million, nine hundred seven thousand, six hundred sixty-eight".