2222958978 has 80 divisors (see below), whose sum is σ = 5073868800. Its totient is φ = 727320384.

The previous prime is 2222958973. The next prime is 2222959009. The reversal of 2222958978 is 8798592222.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (2222958973) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2118598 + ... + 2119646.

It is an arithmetic number, because the mean of its divisors is an integer number (63423360).

Almost surely, 2^2222958978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2222958978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2536934400).

2222958978 is an abundant number, since it is smaller than the sum of its proper divisors (2850909822).

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

2222958978 is a wasteful number, since it uses less digits than its factorization.

2222958978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293 (or 1284 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 2222958978 is about 47148.2659066057. The cubic root of 2222958978 is about 1305.1000795226.

The spelling of 2222958978 in words is "two billion, two hundred twenty-two million, nine hundred fifty-eight thousand, nine hundred seventy-eight".