118798155 has 24 divisors (see below), whose sum is σ = 235334112. Its totient is φ = 54307584.

The previous prime is 118798153. The next prime is 118798177. The reversal of 118798155 is 551897811.

It is not a de Polignac number, because 118798155 - 2¹ = 118798153 is a prime.

It is a super-2 number, since 2×118798155² = 28226003262808050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 118798155.

It is not an unprimeable number, because it can be changed into a prime (118798153) 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, 188254 + ... + 188883.

It is an arithmetic number, because the mean of its divisors is an integer number (9805588).

Almost surely, 2^118798155 is an apocalyptic number.

118798155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

118798155 is a deficient number, since it is larger than the sum of its proper divisors (116535957).

118798155 is a wasteful number, since it uses less digits than its factorization.

118798155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377155 (or 377152 counting only the distinct ones).

The product of its digits is 100800, while the sum is 45.

The square root of 118798155 is about 10899.4566378329. The cubic root of 118798155 is about 491.5902174857.

The spelling of 118798155 in words is "one hundred eighteen million, seven hundred ninety-eight thousand, one hundred fifty-five".