1227792816 has 100 divisors (see below), whose sum is σ = 3569241544. Its totient is φ = 407462400.

The previous prime is 1227792809. The next prime is 1227792821. The reversal of 1227792816 is 6182977221.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 310371 + ... + 314301.

Almost surely, 2^1227792816 is an apocalyptic number.

1227792816 is a gapful number since it is divisible by the number (16) 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 1227792816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1784620772).

1227792816 is an abundant number, since it is smaller than the sum of its proper divisors (2341448728).

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

1227792816 is a wasteful number, since it uses less digits than its factorization.

1227792816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4192 (or 4177 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 1227792816 is about 35039.8746573101. The cubic root of 1227792816 is about 1070.8000003163.

The spelling of 1227792816 in words is "one billion, two hundred twenty-seven million, seven hundred ninety-two thousand, eight hundred sixteen".