990422755 has 16 divisors (see below), whose sum is σ = 1376904384. Its totient is φ = 669841920.

The previous prime is 990422753. The next prime is 990422759. The reversal of 990422755 is 557224099.

990422755 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 990422755 - 2¹ = 990422753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990422753) 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, 191266 + ... + 196375.

It is an arithmetic number, because the mean of its divisors is an integer number (86056524).

Almost surely, 2^990422755 is an apocalyptic number.

990422755 is a deficient number, since it is larger than the sum of its proper divisors (386481629).

990422755 is a wasteful number, since it uses less digits than its factorization.

990422755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387726.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 990422755 is about 31470.9827460154. The cubic root of 990422755 is about 996.7973389119.

The spelling of 990422755 in words is "nine hundred ninety million, four hundred twenty-two thousand, seven hundred fifty-five".