188628955 has 8 divisors (see below), whose sum is σ = 233656704. Its totient is φ = 146035200.

The previous prime is 188628949. The next prime is 188628971. The reversal of 188628955 is 559826881.

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

It is a de Polignac number, because none of the positive numbers 2^k-188628955 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, 608326 + ... + 608635.

It is an arithmetic number, because the mean of its divisors is an integer number (29207088).

Almost surely, 2^188628955 is an apocalyptic number.

188628955 is a deficient number, since it is larger than the sum of its proper divisors (45027749).

188628955 is a wasteful number, since it uses less digits than its factorization.

188628955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216997.

The product of its digits is 1382400, while the sum is 52.

The square root of 188628955 is about 13734.2256789380. The cubic root of 188628955 is about 573.5035619531.

The spelling of 188628955 in words is "one hundred eighty-eight million, six hundred twenty-eight thousand, nine hundred fifty-five".