28220009727 has 64 divisors (see below), whose sum is σ = 47269806080. Its totient is φ = 14579720064.

The previous prime is 28220009717. The next prime is 28220009743. The reversal of 28220009727 is 72790002282.

It is not a de Polignac number, because 28220009727 - 2⁶ = 28220009663 is a prime.

It is a super-2 number, since 2×28220009727² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28220009717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2733858 + ... + 2744160.

It is an arithmetic number, because the mean of its divisors is an integer number (738590720).

Almost surely, 2^28220009727 is an apocalyptic number.

28220009727 is a deficient number, since it is larger than the sum of its proper divisors (19049796353).

28220009727 is a wasteful number, since it uses less digits than its factorization.

28220009727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10532.

The product of its (nonzero) digits is 56448, while the sum is 39.

The spelling of 28220009727 in words is "twenty-eight billion, two hundred twenty million, nine thousand, seven hundred twenty-seven".