28386820532 has 36 divisors (see below), whose sum is σ = 57858000480. Its totient is φ = 12150928944.

The previous prime is 28386820489. The next prime is 28386820543. The reversal of 28386820532 is 23502868382.

It is a super-3 number, since 3×28386820532³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73319 + ... + 249297.

It is an arithmetic number, because the mean of its divisors is an integer number (1607166680).

Almost surely, 2^28386820532 is an apocalyptic number.

It is an amenable number.

28386820532 is an abundant number, since it is smaller than the sum of its proper divisors (29471179948).

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

28386820532 is a wasteful number, since it uses less digits than its factorization.

28386820532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176820 (or 176811 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 47.

The spelling of 28386820532 in words is "twenty-eight billion, three hundred eighty-six million, eight hundred twenty thousand, five hundred thirty-two".