1228878722 has 4 divisors (see below), whose sum is σ = 1843318086. Its totient is φ = 614439360.

The previous prime is 1228878697. The next prime is 1228878737. The reversal of 1228878722 is 2278788221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1206798121 + 22080601 = 34739^2 + 4699^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307219679 + ... + 307219682.

Almost surely, 2^1228878722 is an apocalyptic number.

1228878722 is a deficient number, since it is larger than the sum of its proper divisors (614439364).

1228878722 is an equidigital number, since it uses as much as digits as its factorization.

1228878722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614439363.

The product of its digits is 401408, while the sum is 47.

The square root of 1228878722 is about 35055.3665221176. The cubic root of 1228878722 is about 1071.1155925166.

The spelling of 1228878722 in words is "one billion, two hundred twenty-eight million, eight hundred seventy-eight thousand, seven hundred twenty-two".