990163242 has 12 divisors (see below), whose sum is σ = 2145353730. Its totient is φ = 330054408.

The previous prime is 990163217. The next prime is 990163267. The reversal of 990163242 is 242361099.

It is an interprime number because it is at equal distance from previous prime (990163217) and next prime (990163267).

It can be written as a sum of positive squares in only one way, i.e., 940587561 + 49575681 = 30669^2 + 7041^2 .

It is a junction number, because it is equal to n+sod(n) for n = 990163197 and 990163206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27504517 + ... + 27504552.

Almost surely, 2^990163242 is an apocalyptic number.

990163242 is an abundant number, since it is smaller than the sum of its proper divisors (1155190488).

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

990163242 is a wasteful number, since it uses less digits than its factorization.

990163242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55009077 (or 55009074 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 990163242 is about 31466.8594238446. The cubic root of 990163242 is about 996.7102702121.

The spelling of 990163242 in words is "nine hundred ninety million, one hundred sixty-three thousand, two hundred forty-two".