990122616 has 120 divisors (see below), whose sum is σ = 3226140720. Its totient is φ = 282883104.

The previous prime is 990122599. The next prime is 990122647. The reversal of 990122616 is 616221099.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 16161 + ... + 47343.

It is an arithmetic number, because the mean of its divisors is an integer number (26884506).

Almost surely, 2^990122616 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 990122616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1613070360).

990122616 is an abundant number, since it is smaller than the sum of its proper divisors (2236018104).

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

990122616 is a wasteful number, since it uses less digits than its factorization.

990122616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31215 (or 31195 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 990122616 is about 31466.2138809231. The cubic root of 990122616 is about 996.6966384850.

The spelling of 990122616 in words is "nine hundred ninety million, one hundred twenty-two thousand, six hundred sixteen".