189812616 has 128 divisors (see below), whose sum is σ = 588591360. Its totient is φ = 49766400.

The previous prime is 189812591. The next prime is 189812639. The reversal of 189812616 is 616218981.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116286 + ... + 117906.

It is an arithmetic number, because the mean of its divisors is an integer number (4598370).

Almost surely, 2^189812616 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 189812616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294295680).

189812616 is an abundant number, since it is smaller than the sum of its proper divisors (398778744).

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

189812616 is a wasteful number, since it uses less digits than its factorization.

189812616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695 (or 1691 counting only the distinct ones).

The product of its digits is 41472, while the sum is 42.

The square root of 189812616 is about 13777.2499432942. The cubic root of 189812616 is about 574.7006542692.

The spelling of 189812616 in words is "one hundred eighty-nine million, eight hundred twelve thousand, six hundred sixteen".