28928300220 has 72 divisors (see below), whose sum is σ = 87763917696. Its totient is φ = 7712917632.

The previous prime is 28928300201. The next prime is 28928300221. The reversal of 28928300220 is 2200382982.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28928300221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1586274 + ... + 1604406.

Almost surely, 2^28928300220 is an apocalyptic number.

28928300220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28928300220 is an abundant number, since it is smaller than the sum of its proper divisors (58835617476).

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

28928300220 is a wasteful number, since it uses less digits than its factorization.

28928300220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27011 (or 27006 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 28928300220 in words is "twenty-eight billion, nine hundred twenty-eight million, three hundred thousand, two hundred twenty".