1156000000 has 189 divisors, whose sum is σ = 3063964687. Its totient is φ = 435200000.

The previous prime is 1155999989. The next prime is 1156000037. The reversal of 1156000000 is 6511.

The square root of 1156000000 is 34000.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 10 ways, for example, as 1136498944 + 19501056 = 33712^2 + 4416^2 .

It is a Duffinian number.

It is an unprimeable number.

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 20 ways as a sum of consecutive naturals, for example, 67999992 + ... + 68000008.

Almost surely, 2^1156000000 is an apocalyptic number.

1156000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1156000000 is the 34000-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1156000000

1156000000 is an abundant number, since it is smaller than the sum of its proper divisors (1907964687).

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

1156000000 is an frugal number, since it uses more digits than its factorization.

1156000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 24 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 13.

The cubic root of 1156000000 is about 1049.5084622976.

Adding to 1156000000 its reverse (6511), we get a palindrome (1156006511).

The spelling of 1156000000 in words is "one billion, one hundred fifty-six million", and thus it is an aban number.