28080020532 has 12 divisors (see below), whose sum is σ = 65520047936. Its totient is φ = 9360006840.

The previous prime is 28080020491. The next prime is 28080020539. The reversal of 28080020532 is 23502008082.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×28080020532³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28080020532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28080020539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1170000844 + ... + 1170000867.

Almost surely, 2^28080020532 is an apocalyptic number.

It is an amenable number.

28080020532 is an abundant number, since it is smaller than the sum of its proper divisors (37440027404).

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

28080020532 is a wasteful number, since it uses less digits than its factorization.

28080020532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340001718 (or 2340001716 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The spelling of 28080020532 in words is "twenty-eight billion, eighty million, twenty thousand, five hundred thirty-two".