189404688 has 60 divisors (see below), whose sum is σ = 537837104. Its totient is φ = 57393600.

The previous prime is 189404687. The next prime is 189404693. The reversal of 189404688 is 886404981.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (189404681) 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, 10498 + ... + 22113.

Almost surely, 2^189404688 is an apocalyptic number.

It is an amenable number.

189404688 is an abundant number, since it is smaller than the sum of its proper divisors (348432416).

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

189404688 is a wasteful number, since it uses less digits than its factorization.

189404688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32644 (or 32627 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 48.

The square root of 189404688 is about 13762.4375747903. The cubic root of 189404688 is about 574.2886608738.

The spelling of 189404688 in words is "one hundred eighty-nine million, four hundred four thousand, six hundred eighty-eight".