189400080 has 80 divisors (see below), whose sum is σ = 606104064. Its totient is φ = 48875520.

The previous prime is 189400067. The next prime is 189400087. The reversal of 189400080 is 80004981.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (189400087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5289 + ... + 20168.

Almost surely, 2^189400080 is an apocalyptic number.

189400080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189400080 is an abundant number, since it is smaller than the sum of its proper divisors (416703984).

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

189400080 is a wasteful number, since it uses less digits than its factorization.

189400080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25504 (or 25498 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 189400080 is about 13762.2701615685. The cubic root of 189400080 is about 574.2840035733.

The spelling of 189400080 in words is "one hundred eighty-nine million, four hundred thousand, eighty".