1990918002 has 16 divisors (see below), whose sum is σ = 4191406560. Its totient is φ = 628710912.

The previous prime is 1990918001. The next prime is 1990918109. The reversal of 1990918002 is 2008190991.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1990918001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8731983 + ... + 8732210.

It is an arithmetic number, because the mean of its divisors is an integer number (261962910).

Almost surely, 2^1990918002 is an apocalyptic number.

1990918002 is an abundant number, since it is smaller than the sum of its proper divisors (2200488558).

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

1990918002 is a wasteful number, since it uses less digits than its factorization.

1990918002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17464217.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 1990918002 is about 44619.7041899652. The cubic root of 1990918002 is about 1258.0110558012.

The spelling of 1990918002 in words is "one billion, nine hundred ninety million, nine hundred eighteen thousand, two".