1158935878 has 4 divisors (see below), whose sum is σ = 1738403820. Its totient is φ = 579467938.

The previous prime is 1158935863. The next prime is 1158935881. The reversal of 1158935878 is 8785398511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 289733968 + ... + 289733971.

It is an arithmetic number, because the mean of its divisors is an integer number (434600955).

Almost surely, 2^1158935878 is an apocalyptic number.

1158935878 is a deficient number, since it is larger than the sum of its proper divisors (579467942).

1158935878 is an equidigital number, since it uses as much as digits as its factorization.

1158935878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579467941.

The product of its digits is 2419200, while the sum is 55.

The square root of 1158935878 is about 34043.1472986855. The cubic root of 1158935878 is about 1050.3961854889.

It can be divided in two parts, 115893 and 5878, that added together give a triangular number (121771 = T₄₉₃).

The spelling of 1158935878 in words is "one billion, one hundred fifty-eight million, nine hundred thirty-five thousand, eight hundred seventy-eight".