189305468 has 72 divisors (see below), whose sum is σ = 386698032. Its totient is φ = 81021600.

The previous prime is 189305461. The next prime is 189305471. The reversal of 189305468 is 864503981.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189305461) 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 23 ways as a sum of consecutive naturals, for example, 5116346 + ... + 5116382.

It is an arithmetic number, because the mean of its divisors is an integer number (5370806).

Almost surely, 2^189305468 is an apocalyptic number.

It is an amenable number.

189305468 is an abundant number, since it is smaller than the sum of its proper divisors (197392564).

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

189305468 is a wasteful number, since it uses less digits than its factorization.

189305468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 189305468 is about 13758.8323632494. The cubic root of 189305468 is about 574.1883626283.

The spelling of 189305468 in words is "one hundred eighty-nine million, three hundred five thousand, four hundred sixty-eight".