28039705530 has 96 divisors (see below), whose sum is σ = 70470065664. Its totient is φ = 7132944000.

The previous prime is 28039705501. The next prime is 28039705567. The reversal of 28039705530 is 3550793082.

It is a super-2 number, since 2×28039705530² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4685140 + ... + 4691120.

It is an arithmetic number, because the mean of its divisors is an integer number (734063184).

Almost surely, 2^28039705530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28039705530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35235032832).

28039705530 is an abundant number, since it is smaller than the sum of its proper divisors (42430360134).

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

28039705530 is a wasteful number, since it uses less digits than its factorization.

28039705530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6164 (or 6093 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 28039705530 in words is "twenty-eight billion, thirty-nine million, seven hundred five thousand, five hundred thirty".