28727272080 has 200 divisors, whose sum is σ = 107449315512. Its totient is φ = 7071307776.

The previous prime is 28727272073. The next prime is 28727272097. The reversal of 28727272080 is 8027272782.

It is a happy number.

28727272080 is a `hidden beast` number, since 287 + 27 + 272 + 0 + 80 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4124722176 + 24602549904 = 64224^2 + 156852^2 .

It is a super-2 number, since 2×28727272080² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 86269 + ... + 254748.

Almost surely, 2^28727272080 is an apocalyptic number.

28727272080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28727272080 is an abundant number, since it is smaller than the sum of its proper divisors (78722043432).

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

28727272080 is a wasteful number, since it uses less digits than its factorization.

28727272080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341055 (or 341040 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 45.

The spelling of 28727272080 in words is "twenty-eight billion, seven hundred twenty-seven million, two hundred seventy-two thousand, eighty".