1156117290 has 16 divisors (see below), whose sum is σ = 2774681568. Its totient is φ = 308297936.

The previous prime is 1156117271. The next prime is 1156117297. The reversal of 1156117290 is 927116511.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1156117297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19268592 + ... + 19268651.

It is an arithmetic number, because the mean of its divisors is an integer number (173417598).

Almost surely, 2^1156117290 is an apocalyptic number.

1156117290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1156117290 is an abundant number, since it is smaller than the sum of its proper divisors (1618564278).

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

1156117290 is a wasteful number, since it uses less digits than its factorization.

1156117290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38537253.

The product of its (nonzero) digits is 3780, while the sum is 33.

The square root of 1156117290 is about 34001.7248091917. The cubic root of 1156117290 is about 1049.5439561513.

The spelling of 1156117290 in words is "one billion, one hundred fifty-six million, one hundred seventeen thousand, two hundred ninety".