1149273972 has 108 divisors (see below), whose sum is σ = 3649490208. Its totient is φ = 298504800.

The previous prime is 1149273971. The next prime is 1149273989. The reversal of 1149273972 is 2793729411.

1149273972 is a `hidden beast` number, since 1 + 1 + 492 + 73 + 97 + 2 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149273971) 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 35 ways as a sum of consecutive naturals, for example, 11647 + ... + 49337.

It is an arithmetic number, because the mean of its divisors is an integer number (33791576).

Almost surely, 2^1149273972 is an apocalyptic number.

1149273972 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 1149273972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1824745104).

1149273972 is an abundant number, since it is smaller than the sum of its proper divisors (2500216236).

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

1149273972 is a wasteful number, since it uses less digits than its factorization.

1149273972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37730 (or 37714 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 1149273972 is about 33900.9435266926. The cubic root of 1149273972 is about 1047.4690279308.

The spelling of 1149273972 in words is "one billion, one hundred forty-nine million, two hundred seventy-three thousand, nine hundred seventy-two".