1157944986 has 48 divisors (see below), whose sum is σ = 2744041248. Its totient is φ = 349984800.

The previous prime is 1157944951. The next prime is 1157944999. The reversal of 1157944986 is 6894497511.

1157944986 is a `hidden beast` number, since 11 + 57 + 94 + 498 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71241 + ... + 85971.

It is an arithmetic number, because the mean of its divisors is an integer number (57167526).

Almost surely, 2^1157944986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1157944986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1372020624).

1157944986 is an abundant number, since it is smaller than the sum of its proper divisors (1586096262).

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

1157944986 is a wasteful number, since it uses less digits than its factorization.

1157944986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15147 (or 15144 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 1157944986 is about 34028.5907142802. The cubic root of 1157944986 is about 1050.0967366656.

It can be divided in two parts, 11579 and 44986, that added together give a palindrome (56565).

The spelling of 1157944986 in words is "one billion, one hundred fifty-seven million, nine hundred forty-four thousand, nine hundred eighty-six".