990422942 has 4 divisors (see below), whose sum is σ = 1485634416. Its totient is φ = 495211470.

The previous prime is 990422929. The next prime is 990422947. The reversal of 990422942 is 249224099.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 990422942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990422947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247605734 + ... + 247605737.

It is an arithmetic number, because the mean of its divisors is an integer number (371408604).

Almost surely, 2^990422942 is an apocalyptic number.

990422942 is a deficient number, since it is larger than the sum of its proper divisors (495211474).

990422942 is a wasteful number, since it uses less digits than its factorization.

990422942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495211473.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 990422942 is about 31470.9857170061. The cubic root of 990422942 is about 996.7974016464.

The spelling of 990422942 in words is "nine hundred ninety million, four hundred twenty-two thousand, nine hundred forty-two".