64189356 has 96 divisors (see below), whose sum is σ = 188547072. Its totient is φ = 16511040.

The previous prime is 64189351. The next prime is 64189369. The reversal of 64189356 is 65398146.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (64189351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117075 + ... + 117621.

It is an arithmetic number, because the mean of its divisors is an integer number (1964032).

Almost surely, 2^64189356 is an apocalyptic number.

64189356 is a gapful number since it is divisible by the number (66) 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 64189356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94273536).

64189356 is an abundant number, since it is smaller than the sum of its proper divisors (124357716).

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

64189356 is a wasteful number, since it uses less digits than its factorization.

64189356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 697 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 64189356 is about 8011.8260090943. The cubic root of 64189356 is about 400.3941032457.

It can be divided in two parts, 64 and 189356, that added together give a triangular number (189420 = T₆₁₅).

The spelling of 64189356 in words is "sixty-four million, one hundred eighty-nine thousand, three hundred fifty-six".