1227791040 has 336 divisors, whose sum is σ = 4647785472. Its totient is φ = 273659904.

The previous prime is 1227791027. The next prime is 1227791063. The reversal of 1227791040 is 401977221.

It is a tau number, because it is divible by the number of its divisors (336).

It is a junction number, because it is equal to n+sod(n) for n = 1227790992 and 1227791010.

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 47 ways as a sum of consecutive naturals, for example, 2022417 + ... + 2023023.

Almost surely, 2^1227791040 is an apocalyptic number.

1227791040 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 1227791040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2323892736).

1227791040 is an abundant number, since it is smaller than the sum of its proper divisors (3419994432).

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

1227791040 is a wasteful number, since it uses less digits than its factorization.

1227791040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 1227791040 is about 35039.8493147445. The cubic root of 1227791040 is about 1070.7994840126.

The spelling of 1227791040 in words is "one billion, two hundred twenty-seven million, seven hundred ninety-one thousand, forty".