28789196436 has 288 divisors, whose sum is σ = 100864598016. Its totient is φ = 6679584000.

The previous prime is 28789196411. The next prime is 28789196437. The reversal of 28789196436 is 63469198782.

28789196436 is a `hidden beast` number, since 2 + 8 + 7 + 8 + 9 + 196 + 436 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28789196437) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1104231 + ... + 1130001.

Almost surely, 2^28789196436 is an apocalyptic number.

28789196436 is a gapful number since it is divisible by the number (26) 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 28789196436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50432299008).

28789196436 is an abundant number, since it is smaller than the sum of its proper divisors (72075401580).

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

28789196436 is a wasteful number, since it uses less digits than its factorization.

28789196436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25843 (or 25838 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The spelling of 28789196436 in words is "twenty-eight billion, seven hundred eighty-nine million, one hundred ninety-six thousand, four hundred thirty-six".