28204929280 has 72 divisors (see below), whose sum is σ = 73701440064. Its totient is φ = 10256332800.

The previous prime is 28204929209. The next prime is 28204929331. The reversal of 28204929280 is 8292940282.

It is a self number, because there is not a number n which added to its sum of digits gives 28204929280.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 987516 + ... + 1015675.

It is an arithmetic number, because the mean of its divisors is an integer number (1023631112).

Almost surely, 2^28204929280 is an apocalyptic number.

28204929280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28204929280 is an abundant number, since it is smaller than the sum of its proper divisors (45496510784).

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

28204929280 is a wasteful number, since it uses less digits than its factorization.

28204929280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003223 (or 2003209 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 28204929280 in words is "twenty-eight billion, two hundred four million, nine hundred twenty-nine thousand, two hundred eighty".