188128269 has 12 divisors (see below), whose sum is σ = 310561056. Its totient is φ = 107501832.

The previous prime is 188128231. The next prime is 188128277. The reversal of 188128269 is 962821881.

It is a happy number.

188128269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 188128269 - 2⁷ = 188128141 is a prime.

It is a super-2 number, since 2×188128269² = 70784491193872722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188128769) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1493019 + ... + 1493144.

It is an arithmetic number, because the mean of its divisors is an integer number (25880088).

Almost surely, 2^188128269 is an apocalyptic number.

It is an amenable number.

188128269 is a deficient number, since it is larger than the sum of its proper divisors (122432787).

188128269 is a wasteful number, since it uses less digits than its factorization.

188128269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2986176 (or 2986173 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 188128269 is about 13715.9858923812. The cubic root of 188128269 is about 572.9956872203.

The spelling of 188128269 in words is "one hundred eighty-eight million, one hundred twenty-eight thousand, two hundred sixty-nine".