189821016 has 256 divisors, whose sum is σ = 669772800. Its totient is φ = 48384000.

The previous prime is 189821011. The next prime is 189821057. The reversal of 189821016 is 610128981.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189821011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1679776 + ... + 1679888.

It is an arithmetic number, because the mean of its divisors is an integer number (2616300).

Almost surely, 2^189821016 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 189821016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334886400).

189821016 is an abundant number, since it is smaller than the sum of its proper divisors (479951784).

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

189821016 is a wasteful number, since it uses less digits than its factorization.

189821016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 189821016 is about 13777.5547903102. The cubic root of 189821016 is about 574.7091317778.

Adding to 189821016 its reverse (610128981), we get a palindrome (799949997).

The spelling of 189821016 in words is "one hundred eighty-nine million, eight hundred twenty-one thousand, sixteen".