190888155 has 96 divisors (see below), whose sum is σ = 385482240. Its totient is φ = 86676480.

The previous prime is 190888151. The next prime is 190888171. The reversal of 190888155 is 551888091.

It is not a de Polignac number, because 190888155 - 2² = 190888151 is a prime.

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

Together with 194594085 it forms an amicable pair .

It is a self number, because there is not a number n which added to its sum of digits gives 190888155.

It is not an unprimeable number, because it can be changed into a prime (190888151) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 334020 + ... + 334590.

It is an arithmetic number, because the mean of its divisors is an integer number (4015440).

Almost surely, 2^190888155 is an apocalyptic number.

190888155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

190888155 is an abundant number, since it is smaller than the sum of its proper divisors (194594085).

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

190888155 is a wasteful number, since it uses less digits than its factorization.

190888155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 45.

The square root of 190888155 is about 13816.2279584552. The cubic root of 190888155 is about 575.7840897226.

The spelling of 190888155 in words is "one hundred ninety million, eight hundred eighty-eight thousand, one hundred fifty-five".