8790521990 has 32 divisors (see below), whose sum is σ = 16142509440. Its totient is φ = 3445894144.

The previous prime is 8790521989. The next prime is 8790522047. The reversal of 8790521990 is 991250978.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56867 + ... + 144273.

It is an arithmetic number, because the mean of its divisors is an integer number (504453420).

Almost surely, 2^8790521990 is an apocalyptic number.

8790521990 is a deficient number, since it is larger than the sum of its proper divisors (7351987450).

8790521990 is a wasteful number, since it uses less digits than its factorization.

8790521990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87616.

The product of its (nonzero) digits is 408240, while the sum is 50.

The square root of 8790521990 is about 93757.7836235478. The cubic root of 8790521990 is about 2063.8187554616.

The spelling of 8790521990 in words is "eight billion, seven hundred ninety million, five hundred twenty-one thousand, nine hundred ninety".