8019906390 has 96 divisors (see below), whose sum is σ = 21661095456. Its totient is φ = 2134978560.

The previous prime is 8019906379. The next prime is 8019906397. The reversal of 8019906390 is 936099108.

8019906390 is a `hidden beast` number, since 8 + 0 + 1 + 9 + 9 + 0 + 639 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8019906397) 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 47 ways as a sum of consecutive naturals, for example, 1603734 + ... + 1608726.

It is an arithmetic number, because the mean of its divisors is an integer number (225636411).

Almost surely, 2^8019906390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8019906390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10830547728).

8019906390 is an abundant number, since it is smaller than the sum of its proper divisors (13641189066).

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

8019906390 is a wasteful number, since it uses less digits than its factorization.

8019906390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5676 (or 5664 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 8019906390 is about 89553.9300645148. The cubic root of 8019906390 is about 2001.6574918143.

The spelling of 8019906390 in words is "eight billion, nineteen million, nine hundred six thousand, three hundred ninety".