1222679808 has 216 divisors, whose sum is σ = 4117171968. Its totient is φ = 341692416.

The previous prime is 1222679803. The next prime is 1222679863. The reversal of 1222679808 is 8089762221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222679803) 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, 757210 + ... + 758822.

Almost surely, 2^1222679808 is an apocalyptic number.

1222679808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222679808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2058585984).

1222679808 is an abundant number, since it is smaller than the sum of its proper divisors (2894492160).

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

1222679808 is a wasteful number, since it uses less digits than its factorization.

1222679808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689 (or 1672 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 1222679808 is about 34966.8386903935. The cubic root of 1222679808 is about 1069.3115226316.

The spelling of 1222679808 in words is "one billion, two hundred twenty-two million, six hundred seventy-nine thousand, eight hundred eight".