1145772216 has 112 divisors (see below), whose sum is σ = 3239127360. Its totient is φ = 379779840.

The previous prime is 1145772203. The next prime is 1145772217. The reversal of 1145772216 is 6122775411.

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 (1145772217) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1300096 + ... + 1300976.

It is an arithmetic number, because the mean of its divisors is an integer number (28920780).

Almost surely, 2^1145772216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1145772216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1619563680).

1145772216 is an abundant number, since it is smaller than the sum of its proper divisors (2093355144).

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

1145772216 is an equidigital number, since it uses as much as digits as its factorization.

1145772216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128 (or 1109 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 1145772216 is about 33849.2572444360. The cubic root of 1145772216 is about 1046.4040910748.

The spelling of 1145772216 in words is "one billion, one hundred forty-five million, seven hundred seventy-two thousand, two hundred sixteen".