28615384620 has 48 divisors (see below), whose sum is σ = 89025642720. Its totient is φ = 7630769088.

The previous prime is 28615384619. The next prime is 28615384627. The reversal of 28615384620 is 2648351682.

28615384620 is a `hidden beast` number, since 2 + 8 + 6 + 15 + 3 + 8 + 4 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (28615384627) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 26495187 + ... + 26496266.

It is an arithmetic number, because the mean of its divisors is an integer number (1854700890).

Almost surely, 2^28615384620 is an apocalyptic number.

28615384620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28615384620 is an abundant number, since it is smaller than the sum of its proper divisors (60410258100).

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

28615384620 is a wasteful number, since it uses less digits than its factorization.

28615384620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52991471 (or 52991463 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 28615384620 in words is "twenty-eight billion, six hundred fifteen million, three hundred eighty-four thousand, six hundred twenty".