990737620 has 12 divisors (see below), whose sum is σ = 2080549044. Its totient is φ = 396295040.

The previous prime is 990737599. The next prime is 990737633. The reversal of 990737620 is 26737099.

It can be written as a sum of positive squares in 2 ways, for example, as 162103824 + 828633796 = 12732^2 + 28786^2 .

It is a super-2 number, since 2×990737620² = 1963122063366528800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24768421 + ... + 24768460.

It is an arithmetic number, because the mean of its divisors is an integer number (173379087).

Almost surely, 2^990737620 is an apocalyptic number.

It is an amenable number.

990737620 is an abundant number, since it is smaller than the sum of its proper divisors (1089811424).

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

990737620 is a wasteful number, since it uses less digits than its factorization.

990737620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49536890 (or 49536888 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 990737620 is about 31475.9848138227. The cubic root of 990737620 is about 996.9029582342.

The spelling of 990737620 in words is "nine hundred ninety million, seven hundred thirty-seven thousand, six hundred twenty".