1226855808 has 160 divisors (see below), whose sum is σ = 3673719720. Its totient is φ = 406425600.

The previous prime is 1226855807. The next prime is 1226855809. The reversal of 1226855808 is 8085586221.

1226855808 is a `hidden beast` number, since 1 + 2 + 2 + 68 + 5 + 580 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (1226855807) and next prime (1226855809).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226855801) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2498443 + ... + 2498933.

Almost surely, 2^1226855808 is an apocalyptic number.

1226855808 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 1226855808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1836859860).

1226855808 is an abundant number, since it is smaller than the sum of its proper divisors (2446863912).

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

1226855808 is an equidigital number, since it uses as much as digits as its factorization.

1226855808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 45.

The square root of 1226855808 is about 35026.5015095713. The cubic root of 1226855808 is about 1070.5275321111.

The spelling of 1226855808 in words is "one billion, two hundred twenty-six million, eight hundred fifty-five thousand, eight hundred eight".