1158979158 has 32 divisors (see below), whose sum is σ = 2580856320. Its totient is φ = 385524360.

The previous prime is 1158979153. The next prime is 1158979163. The reversal of 1158979158 is 8519798511.

It is a happy number.

1158979158 is a `hidden beast` number, since 1 + 1 + 589 + 7 + 9 + 1 + 58 = 666.

It is an interprime number because it is at equal distance from previous prime (1158979153) and next prime (1158979163).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158979153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4263 + ... + 48333.

It is an arithmetic number, because the mean of its divisors is an integer number (80651760).

Almost surely, 2^1158979158 is an apocalyptic number.

1158979158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1158979158 is an abundant number, since it is smaller than the sum of its proper divisors (1421877162).

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

1158979158 is a wasteful number, since it uses less digits than its factorization.

1158979158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44569 (or 44563 counting only the distinct ones).

The product of its digits is 907200, while the sum is 54.

The square root of 1158979158 is about 34043.7829566574. The cubic root of 1158979158 is about 1050.4092608689.

The spelling of 1158979158 in words is "one billion, one hundred fifty-eight million, nine hundred seventy-nine thousand, one hundred fifty-eight".