189397936 has 60 divisors (see below), whose sum is σ = 459730992. Its totient is φ = 74922624.

The previous prime is 189397933. The next prime is 189397993. The reversal of 189397936 is 639793981.

It is a super-2 number, since 2×189397936² = 71743156322120192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189397933) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 901 + ... + 19483.

Almost surely, 2^189397936 is an apocalyptic number.

189397936 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 189397936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229865496).

189397936 is an abundant number, since it is smaller than the sum of its proper divisors (270333056).

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

189397936 is a wasteful number, since it uses less digits than its factorization.

189397936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18618 (or 18605 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 55.

The square root of 189397936 is about 13762.1922672225. The cubic root of 189397936 is about 574.2818366092.

The spelling of 189397936 in words is "one hundred eighty-nine million, three hundred ninety-seven thousand, nine hundred thirty-six".