28604067840 has 520 divisors, whose sum is σ = 105184628208. Its totient is φ = 7431782400.

The previous prime is 28604067773. The next prime is 28604067847. The reversal of 28604067840 is 4876040682.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28604067847) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 71331640 + ... + 71332040.

Almost surely, 2^28604067840 is an apocalyptic number.

28604067840 is a gapful number since it is divisible by the number (20) 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 28604067840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52592314104).

28604067840 is an abundant number, since it is smaller than the sum of its proper divisors (76580560368).

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

28604067840 is an equidigital number, since it uses as much as digits as its factorization.

28604067840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 28604067840 in words is "twenty-eight billion, six hundred four million, sixty-seven thousand, eight hundred forty".