189305816 has 64 divisors (see below), whose sum is σ = 435840000. Its totient is φ = 76839840.

The previous prime is 189305813. The next prime is 189305821. The reversal of 189305816 is 618503981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189305813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50321 + ... + 53951.

It is an arithmetic number, because the mean of its divisors is an integer number (6810000).

Almost surely, 2^189305816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189305816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217920000).

189305816 is an abundant number, since it is smaller than the sum of its proper divisors (246534184).

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

189305816 is a wasteful number, since it uses less digits than its factorization.

189305816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3677 (or 3659 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 189305816 is about 13758.8450096656. The cubic root of 189305816 is about 574.1887144713.

The spelling of 189305816 in words is "one hundred eighty-nine million, three hundred five thousand, eight hundred sixteen".