1149780992 has 66 divisors (see below), whose sum is σ = 2443147722. Its totient is φ = 538968064.

The previous prime is 1149780977. The next prime is 1149780997. The reversal of 1149780992 is 2990879411.

It can be written as a sum of positive squares in 3 ways, for example, as 999571456 + 150209536 = 31616^2 + 12256^2 .

It is a zygodrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1149780992.

It is not an unprimeable number, because it can be changed into a prime (1149780997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4473728 + ... + 4473984.

Almost surely, 2^1149780992 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 1149780992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1221573861).

1149780992 is an abundant number, since it is smaller than the sum of its proper divisors (1293366730).

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

1149780992 is an frugal number, since it uses more digits than its factorization.

1149780992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 1149780992 is about 33908.4206650796. The cubic root of 1149780992 is about 1047.6230410090.

The spelling of 1149780992 in words is "one billion, one hundred forty-nine million, seven hundred eighty thousand, nine hundred ninety-two".