189423616 has 56 divisors (see below), whose sum is σ = 399089880. Its totient is φ = 89653248.

The previous prime is 189423601. The next prime is 189423623. The reversal of 189423616 is 616324981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155040 + ... + 156256.

It is an arithmetic number, because the mean of its divisors is an integer number (7126605).

Almost surely, 2^189423616 is an apocalyptic number.

189423616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189423616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199544940).

189423616 is an abundant number, since it is smaller than the sum of its proper divisors (209666264).

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

189423616 is an equidigital number, since it uses as much as digits as its factorization.

189423616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262 (or 1238 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 189423616 is about 13763.1252264884. The cubic root of 189423616 is about 574.3077905898.

The spelling of 189423616 in words is "one hundred eighty-nine million, four hundred twenty-three thousand, six hundred sixteen".