1157628881 has 4 divisors (see below), whose sum is σ = 1174906992. Its totient is φ = 1140350772.

The previous prime is 1157628859. The next prime is 1157628919. The reversal of 1157628881 is 1888267511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1157628881 is a prime.

It is a super-2 number, since 2×1157628881² = 2680209252250624322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1157628851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8638955 + ... + 8639088.

It is an arithmetic number, because the mean of its divisors is an integer number (293726748).

Almost surely, 2^1157628881 is an apocalyptic number.

It is an amenable number.

1157628881 is a deficient number, since it is larger than the sum of its proper divisors (17278111).

1157628881 is an equidigital number, since it uses as much as digits as its factorization.

1157628881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17278110.

The product of its digits is 215040, while the sum is 47.

The square root of 1157628881 is about 34023.9457000507. The cubic root of 1157628881 is about 1050.0011733925.

The spelling of 1157628881 in words is "one billion, one hundred fifty-seven million, six hundred twenty-eight thousand, eight hundred eighty-one".