1990089772 has 12 divisors (see below), whose sum is σ = 3799262376. Its totient is φ = 904586240.

The previous prime is 1990089769. The next prime is 1990089779. The reversal of 1990089772 is 2779800991.

It is not an unprimeable number, because it can be changed into a prime (1990089779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22614613 + ... + 22614700.

It is an arithmetic number, because the mean of its divisors is an integer number (316605198).

Almost surely, 2^1990089772 is an apocalyptic number.

It is an amenable number.

1990089772 is a deficient number, since it is larger than the sum of its proper divisors (1809172604).

1990089772 is a wasteful number, since it uses less digits than its factorization.

1990089772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45229328 (or 45229326 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 52.

The square root of 1990089772 is about 44610.4222351683. The cubic root of 1990089772 is about 1257.8365856973.

The spelling of 1990089772 in words is "one billion, nine hundred ninety million, eighty-nine thousand, seven hundred seventy-two".