184428989 has 8 divisors (see below), whose sum is σ = 186264120. Its totient is φ = 182601216.

The previous prime is 184428983. The next prime is 184428997. The reversal of 184428989 is 989824481.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 284089 + 184144900 = 533^2 + 13570^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-184428989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 184428989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (184428983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57767 + ... + 60875.

It is an arithmetic number, because the mean of its divisors is an integer number (23283015).

Almost surely, 2^184428989 is an apocalyptic number.

It is an amenable number.

184428989 is a deficient number, since it is larger than the sum of its proper divisors (1835131).

184428989 is a wasteful number, since it uses less digits than its factorization.

184428989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3679.

The product of its digits is 1327104, while the sum is 53.

The square root of 184428989 is about 13580.4635046084. The cubic root of 184428989 is about 569.2150774050.

The spelling of 184428989 in words is "one hundred eighty-four million, four hundred twenty-eight thousand, nine hundred eighty-nine".