28835001020 has 192 divisors, whose sum is σ = 73713991680. Its totient is φ = 9265686528.

The previous prime is 28835001011. The next prime is 28835001023. The reversal of 28835001020 is 2010053882.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28835001023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26141789 + ... + 26142891.

It is an arithmetic number, because the mean of its divisors is an integer number (383927040).

Almost surely, 2^28835001020 is an apocalyptic number.

28835001020 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 28835001020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36856995840).

28835001020 is an abundant number, since it is smaller than the sum of its proper divisors (44878990660).

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

28835001020 is a wasteful number, since it uses less digits than its factorization.

28835001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 1330 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The spelling of 28835001020 in words is "twenty-eight billion, eight hundred thirty-five million, one thousand, twenty".