1990620944 has 20 divisors (see below), whose sum is σ = 4153507596. Its totient is φ = 918748032.

The previous prime is 1990620911. The next prime is 1990620953. The reversal of 1990620944 is 4490260991.

It can be written as a sum of positive squares in 2 ways, for example, as 787363600 + 1203257344 = 28060^2 + 34688^2 .

It is a super-2 number, since 2×1990620944² = 7925143485382902272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1990620895 and 1990620904.

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, 4784939 + ... + 4785354.

Almost surely, 2^1990620944 is an apocalyptic number.

It is an amenable number.

1990620944 is an abundant number, since it is smaller than the sum of its proper divisors (2162886652).

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

1990620944 is a wasteful number, since it uses less digits than its factorization.

1990620944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9570314 (or 9570308 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 1990620944 is about 44616.3752897969. The cubic root of 1990620944 is about 1257.9484848606.

The spelling of 1990620944 in words is "one billion, nine hundred ninety million, six hundred twenty thousand, nine hundred forty-four".