64189404 has 72 divisors (see below), whose sum is σ = 168779520. Its totient is φ = 20554272.

The previous prime is 64189397. The next prime is 64189409. The reversal of 64189404 is 40498146.

It is a happy number.

64189404 is a `hidden beast` number, since 641 + 8 + 9 + 4 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64189409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99507 + ... + 100149.

It is an arithmetic number, because the mean of its divisors is an integer number (2344160).

Almost surely, 2^64189404 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 64189404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84389760).

64189404 is an abundant number, since it is smaller than the sum of its proper divisors (104590116).

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

64189404 is a wasteful number, since it uses less digits than its factorization.

64189404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759 (or 754 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 64189404 is about 8011.8290046655. The cubic root of 64189404 is about 400.3942030489.

The spelling of 64189404 in words is "sixty-four million, one hundred eighty-nine thousand, four hundred four".