990217822 has 8 divisors (see below), whose sum is σ = 1620356472. Its totient is φ = 450099000.

The previous prime is 990217799. The next prime is 990217829. The reversal of 990217822 is 228712099.

990217822 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990217829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22504929 + ... + 22504972.

It is an arithmetic number, because the mean of its divisors is an integer number (202544559).

Almost surely, 2^990217822 is an apocalyptic number.

990217822 is a deficient number, since it is larger than the sum of its proper divisors (630138650).

990217822 is a wasteful number, since it uses less digits than its factorization.

990217822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45009914.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 990217822 is about 31467.7266735301. The cubic root of 990217822 is about 996.7285835045.

It can be divided in two parts, 990 and 217822, that added together give a palindrome (218812).

The spelling of 990217822 in words is "nine hundred ninety million, two hundred seventeen thousand, eight hundred twenty-two".