9022221978 has 48 divisors (see below), whose sum is σ = 22667413440. Its totient is φ = 2343432960.

The previous prime is 9022221977. The next prime is 9022222063. The reversal of 9022221978 is 8791222209.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (9022221973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 882583 + ... + 892746.

It is an arithmetic number, because the mean of its divisors is an integer number (472237780).

Almost surely, 2^9022221978 is an apocalyptic number.

9022221978 is an abundant number, since it is smaller than the sum of its proper divisors (13645191462).

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

9022221978 is a wasteful number, since it uses less digits than its factorization.

9022221978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775363 (or 1775352 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 9022221978 is about 94985.3777062554. The cubic root of 9022221978 is about 2081.7944002880.

The spelling of 9022221978 in words is "nine billion, twenty-two million, two hundred twenty-one thousand, nine hundred seventy-eight".