1228771800 has 432 divisors, whose sum is σ = 4569439680. Its totient is φ = 295488000.

The previous prime is 1228771799. The next prime is 1228771823. The reversal of 1228771800 is 81778221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 20143770 + ... + 20143830.

Almost surely, 2^1228771800 is an apocalyptic number.

1228771800 is a gapful number since it is divisible by the number (10) 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 1228771800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2284719840).

1228771800 is an abundant number, since it is smaller than the sum of its proper divisors (3340667880).

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

1228771800 is a wasteful number, since it uses less digits than its factorization.

1228771800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 1228771800 is about 35053.8414442697. The cubic root of 1228771800 is about 1071.0845264884.

The spelling of 1228771800 in words is "one billion, two hundred twenty-eight million, seven hundred seventy-one thousand, eight hundred".