118561000 has 64 divisors (see below), whose sum is σ = 282793680. Its totient is φ = 46508800.

The previous prime is 118560991. The next prime is 118561013. The reversal of 118561000 is 165811.

It can be written as a sum of positive squares in 8 ways, for example, as 22638564 + 95922436 = 4758^2 + 9794^2 .

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 15 ways as a sum of consecutive naturals, for example, 51882 + ... + 54118.

Almost surely, 2^118561000 is an apocalyptic number.

118561000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 118561000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141396840).

118561000 is an abundant number, since it is smaller than the sum of its proper divisors (164232680).

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

118561000 is a wasteful number, since it uses less digits than its factorization.

118561000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2311 (or 2297 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 118561000 is about 10888.5719908535. The cubic root of 118561000 is about 491.2628814765.

The spelling of 118561000 in words is "one hundred eighteen million, five hundred sixty-one thousand".