990422940 has 96 divisors (see below), whose sum is σ = 2994001920. Its totient is φ = 243184896.

The previous prime is 990422929. The next prime is 990422947. The reversal of 990422940 is 49224099.

990422940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 in 31 ways as a sum of consecutive naturals, for example, 362901 + ... + 365619.

It is an arithmetic number, because the mean of its divisors is an integer number (31187520).

Almost surely, 2^990422940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990422940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1497000960).

990422940 is an abundant number, since it is smaller than the sum of its proper divisors (2003578980).

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

990422940 is a wasteful number, since it uses less digits than its factorization.

990422940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211 (or 3209 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 990422940 is about 31470.9856852308. The cubic root of 990422940 is about 996.7974009755.

The spelling of 990422940 in words is "nine hundred ninety million, four hundred twenty-two thousand, nine hundred forty".