1158957992 has 32 divisors (see below), whose sum is σ = 2207891520. Its totient is φ = 570218880.

The previous prime is 1158957979. The next prime is 1158957997. The reversal of 1158957992 is 2997598511.

It is not an unprimeable number, because it can be changed into a prime (1158957997) 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, 348803 + ... + 352109.

It is an arithmetic number, because the mean of its divisors is an integer number (68996610).

Almost surely, 2^1158957992 is an apocalyptic number.

It is an amenable number.

1158957992 is a deficient number, since it is larger than the sum of its proper divisors (1048933528).

1158957992 is a wasteful number, since it uses less digits than its factorization.

1158957992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001 (or 3997 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 56.

The square root of 1158957992 is about 34043.4720908429. The cubic root of 1158957992 is about 1050.4028664204.

The spelling of 1158957992 in words is "one billion, one hundred fifty-eight million, nine hundred fifty-seven thousand, nine hundred ninety-two".