28555415320 has 16 divisors (see below), whose sum is σ = 64249684560. Its totient is φ = 11422166112.

The previous prime is 28555415309. The next prime is 28555415323. The reversal of 28555415320 is 2351455582.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 713885383 = 28555415320 / (2 + 8 + 5 + 5 + 5 + 4 + 1 + 5 + 3 + 2 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28555415323) 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, 356942652 + ... + 356942731.

It is an arithmetic number, because the mean of its divisors is an integer number (4015605285).

Almost surely, 2^28555415320 is an apocalyptic number.

28555415320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28555415320 is an abundant number, since it is smaller than the sum of its proper divisors (35694269240).

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

28555415320 is a wasteful number, since it uses less digits than its factorization.

28555415320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713885394 (or 713885390 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 40.

The spelling of 28555415320 in words is "twenty-eight billion, five hundred fifty-five million, four hundred fifteen thousand, three hundred twenty".