189497916 has 72 divisors (see below), whose sum is σ = 497055104. Its totient is φ = 60808320.

The previous prime is 189497879. The next prime is 189497923. The reversal of 189497916 is 619794981.

It is a congruent number.

It is an unprimeable number.

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, 308826 + ... + 309438.

Almost surely, 2^189497916 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 189497916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248527552).

189497916 is an abundant number, since it is smaller than the sum of its proper divisors (307557188).

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

189497916 is a wasteful number, since it uses less digits than its factorization.

189497916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931 (or 926 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The square root of 189497916 is about 13765.8242034395. The cubic root of 189497916 is about 574.3828700894.

The spelling of 189497916 in words is "one hundred eighty-nine million, four hundred ninety-seven thousand, nine hundred sixteen".