118155840 has 224 divisors, whose sum is σ = 417844224. Its totient is φ = 28047360.

The previous prime is 118155833. The next prime is 118155871. The reversal of 118155840 is 48551811.

It is a super-2 number, since 2×118155840² = 27921605052211200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a plaindrome in base 14.

It is a zygodrome in base 14.

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 31 ways as a sum of consecutive naturals, for example, 707437 + ... + 707603.

It is an arithmetic number, because the mean of its divisors is an integer number (1865376).

Almost surely, 2^118155840 is an apocalyptic number.

118155840 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 118155840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208922112).

118155840 is an abundant number, since it is smaller than the sum of its proper divisors (299688384).

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

118155840 is a wasteful number, since it uses less digits than its factorization.

118155840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 33.

The square root of 118155840 is about 10869.9512418410. The cubic root of 118155840 is about 490.7026432085.

The spelling of 118155840 in words is "one hundred eighteen million, one hundred fifty-five thousand, eight hundred forty".