1158681398 has 16 divisors (see below), whose sum is σ = 1987184544. Its totient is φ = 496359360.

The previous prime is 1158681383. The next prime is 1158681409. The reversal of 1158681398 is 8931868511.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17138 + ... + 51098.

It is an arithmetic number, because the mean of its divisors is an integer number (124199034).

Almost surely, 2^1158681398 is an apocalyptic number.

1158681398 is a deficient number, since it is larger than the sum of its proper divisors (828503146).

1158681398 is a wasteful number, since it uses less digits than its factorization.

1158681398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36407.

The product of its digits is 414720, while the sum is 50.

The square root of 1158681398 is about 34039.4094837146. The cubic root of 1158681398 is about 1050.3192976030.

The spelling of 1158681398 in words is "one billion, one hundred fifty-eight million, six hundred eighty-one thousand, three hundred ninety-eight".