28533138620 has 24 divisors (see below), whose sum is σ = 68479533024. Its totient is φ = 9782790336.

The previous prime is 28533138619. The next prime is 28533138661. The reversal of 28533138620 is 2683133582.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101903927 + ... + 101904206.

It is an arithmetic number, because the mean of its divisors is an integer number (2853313876).

Almost surely, 2^28533138620 is an apocalyptic number.

28533138620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28533138620 is an abundant number, since it is smaller than the sum of its proper divisors (39946394404).

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

28533138620 is a wasteful number, since it uses less digits than its factorization.

28533138620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203808149 (or 203808147 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 28533138620 in words is "twenty-eight billion, five hundred thirty-three million, one hundred thirty-eight thousand, six hundred twenty".