8221913890 has 64 divisors (see below), whose sum is σ = 15764855040. Its totient is φ = 3078604800.

The previous prime is 8221913873. The next prime is 8221913957. The reversal of 8221913890 is 983191228.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6845290 + ... + 6846490.

It is an arithmetic number, because the mean of its divisors is an integer number (246325860).

Almost surely, 2^8221913890 is an apocalyptic number.

8221913890 is a deficient number, since it is larger than the sum of its proper divisors (7542941150).

8221913890 is a wasteful number, since it uses less digits than its factorization.

8221913890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 8221913890 is about 90674.7698646101. The cubic root of 8221913890 is about 2018.3244192420.

The spelling of 8221913890 in words is "eight billion, two hundred twenty-one million, nine hundred thirteen thousand, eight hundred ninety".