28435611204 has 864 divisors, whose sum is σ = 109798416000. Its totient is φ = 6061547520.

The previous prime is 28435611179. The next prime is 28435611209. The reversal of 28435611204 is 40211653482.

It is a happy number.

28435611204 is a `hidden beast` number, since 2 + 8 + 4 + 35 + 611 + 2 + 0 + 4 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (28435611209) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 81477222 + ... + 81477570.

It is an arithmetic number, because the mean of its divisors is an integer number (127081500).

Almost surely, 2^28435611204 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 28435611204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54899208000).

28435611204 is an abundant number, since it is smaller than the sum of its proper divisors (81362804796).

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

28435611204 is a wasteful number, since it uses less digits than its factorization.

28435611204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 28435611204 in words is "twenty-eight billion, four hundred thirty-five million, six hundred eleven thousand, two hundred four".