28393537536 has 612 divisors, whose sum is σ = 105534174928. Its totient is φ = 7162822656.

The previous prime is 28393537531. The next prime is 28393537553. The reversal of 28393537536 is 63573539382.

It is a happy number.

28393537536 is a `hidden beast` number, since 28 + 39 + 3 + 53 + 7 + 536 = 666.

Its product of digits (12247200) is a multiple of the sum of its prime divisors (48).

It is not an unprimeable number, because it can be changed into a prime (28393537531) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1234501621 + ... + 1234501643.

Almost surely, 2^28393537536 is an apocalyptic number.

28393537536 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 28393537536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52767087464).

28393537536 is an abundant number, since it is smaller than the sum of its proper divisors (77140637392).

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

28393537536 is an equidigital number, since it uses as much as digits as its factorization.

28393537536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 48 counting only the distinct ones).

The product of its digits is 12247200, while the sum is 54.

The spelling of 28393537536 in words is "twenty-eight billion, three hundred ninety-three million, five hundred thirty-seven thousand, five hundred thirty-six".