1152991858 has 32 divisors (see below), whose sum is σ = 1846131840. Its totient is φ = 538513920.

The previous prime is 1152991849. The next prime is 1152991907. The reversal of 1152991858 is 8581992511.

It is a super-2 number, since 2×1152991858² = 2658780449228584328, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 15 ways as a sum of consecutive naturals, for example, 1551435 + ... + 1552177.

It is an arithmetic number, because the mean of its divisors is an integer number (57691620).

Almost surely, 2^1152991858 is an apocalyptic number.

1152991858 is a deficient number, since it is larger than the sum of its proper divisors (693139982).

1152991858 is a wasteful number, since it uses less digits than its factorization.

1152991858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282.

The product of its digits is 259200, while the sum is 49.

The square root of 1152991858 is about 33955.7338015246. The cubic root of 1152991858 is about 1048.5973282456.

The spelling of 1152991858 in words is "one billion, one hundred fifty-two million, nine hundred ninety-one thousand, eight hundred fifty-eight".