1229981922 has 128 divisors (see below), whose sum is σ = 3024107520. Its totient is φ = 372874752.

The previous prime is 1229981917. The next prime is 1229981923. The reversal of 1229981922 is 2291899221.

It is not an unprimeable number, because it can be changed into a prime (1229981923) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5515503 + ... + 5515725.

It is an arithmetic number, because the mean of its divisors is an integer number (23625840).

Almost surely, 2^1229981922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1229981922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1512053760).

1229981922 is an abundant number, since it is smaller than the sum of its proper divisors (1794125598).

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

1229981922 is an equidigital number, since it uses as much as digits as its factorization.

1229981922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 338 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 1229981922 is about 35071.0981008579. The cubic root of 1229981922 is about 1071.4360204739.

The spelling of 1229981922 in words is "one billion, two hundred twenty-nine million, nine hundred eighty-one thousand, nine hundred twenty-two".