189623988 has 36 divisors (see below), whose sum is σ = 482515488. Its totient is φ = 62787600.

The previous prime is 189623981. The next prime is 189623989. The reversal of 189623988 is 889326981.

It is a happy number.

189623988 is a `hidden beast` number, since 1 + 8 + 9 + 623 + 9 + 8 + 8 = 666.

189623988 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

189623988 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189623981) 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, 12006 + ... + 22877.

It is an arithmetic number, because the mean of its divisors is an integer number (13403208).

Almost surely, 2^189623988 is an apocalyptic number.

189623988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

189623988 is an abundant number, since it is smaller than the sum of its proper divisors (292891500).

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

189623988 is a wasteful number, since it uses less digits than its factorization.

189623988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35044 (or 35039 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 189623988 is about 13770.4026084933. The cubic root of 189623988 is about 574.5102198529.

The spelling of 189623988 in words is "one hundred eighty-nine million, six hundred twenty-three thousand, nine hundred eighty-eight".