189408155 has 8 divisors (see below), whose sum is σ = 227671584. Its totient is φ = 151272000.

The previous prime is 189408139. The next prime is 189408161. The reversal of 189408155 is 551804981.

189408155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189408155 - 2⁴ = 189408139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28511 + ... + 34520.

It is an arithmetic number, because the mean of its divisors is an integer number (28458948).

Almost surely, 2^189408155 is an apocalyptic number.

189408155 is a deficient number, since it is larger than the sum of its proper divisors (38263429).

189408155 is an equidigital number, since it uses as much as digits as its factorization.

189408155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63637.

The product of its (nonzero) digits is 57600, while the sum is 41.

The square root of 189408155 is about 13762.5635330050. The cubic root of 189408155 is about 574.2921649170.

The spelling of 189408155 in words is "one hundred eighty-nine million, four hundred eight thousand, one hundred fifty-five".