189021216 has 48 divisors (see below), whose sum is σ = 506749824. Its totient is φ = 61665024.

The previous prime is 189021211. The next prime is 189021233. The reversal of 189021216 is 612120981.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (189021211) 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, 16435 + ... + 25458.

It is an arithmetic number, because the mean of its divisors is an integer number (10557288).

Almost surely, 2^189021216 is an apocalyptic number.

189021216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

189021216 is an abundant number, since it is smaller than the sum of its proper divisors (317728608).

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

189021216 is a wasteful number, since it uses less digits than its factorization.

189021216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41953 (or 41945 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 189021216 is about 13748.4986816743. The cubic root of 189021216 is about 573.9008274399.

The spelling of 189021216 in words is "one hundred eighty-nine million, twenty-one thousand, two hundred sixteen".