1155793212 has 240 divisors, whose sum is σ = 3778080768. Its totient is φ = 300464640.

The previous prime is 1155793211. The next prime is 1155793241. The reversal of 1155793212 is 2123975511.

1155793212 is a `hidden beast` number, since 1 + 1 + 557 + 93 + 2 + 12 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155793211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1194753 + ... + 1195719.

Almost surely, 2^1155793212 is an apocalyptic number.

1155793212 is a gapful number since it is divisible by the number (12) 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 1155793212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1889040384).

1155793212 is an abundant number, since it is smaller than the sum of its proper divisors (2622287556).

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

1155793212 is a wasteful number, since it uses less digits than its factorization.

1155793212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038 (or 1027 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 1155793212 is about 33996.9588639925. The cubic root of 1155793212 is about 1049.4458790514.

The spelling of 1155793212 in words is "one billion, one hundred fifty-five million, seven hundred ninety-three thousand, two hundred twelve".