1135558998 has 48 divisors (see below), whose sum is σ = 2819321856. Its totient is φ = 323584560.

The previous prime is 1135558987. The next prime is 1135558999. The reversal of 1135558998 is 8998555311.

It is a happy number.

1135558998 is a `hidden beast` number, since 1 + 1 + 3 + 55 + 589 + 9 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1135558999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36493 + ... + 60023.

It is an arithmetic number, because the mean of its divisors is an integer number (58735872).

Almost surely, 2^1135558998 is an apocalyptic number.

1135558998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1135558998 is an abundant number, since it is smaller than the sum of its proper divisors (1683762858).

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

1135558998 is a wasteful number, since it uses less digits than its factorization.

1135558998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23929 (or 23926 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 54.

The square root of 1135558998 is about 33698.0562940951. The cubic root of 1135558998 is about 1043.2856510604.

The spelling of 1135558998 in words is "one billion, one hundred thirty-five million, five hundred fifty-eight thousand, nine hundred ninety-eight".