28919071365 has 32 divisors (see below), whose sum is σ = 49450227840. Its totient is φ = 14380560384.

The previous prime is 28919071213. The next prime is 28919071369. The reversal of 28919071365 is 56317091982.

It is not a de Polignac number, because 28919071365 - 2¹⁴ = 28919054981 is a prime.

It is a super-2 number, since 2×28919071365² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28919071369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 502660 + ... + 557229.

It is an arithmetic number, because the mean of its divisors is an integer number (1545319620).

Almost surely, 2^28919071365 is an apocalyptic number.

It is an amenable number.

28919071365 is a deficient number, since it is larger than the sum of its proper divisors (20531156475).

28919071365 is a wasteful number, since it uses less digits than its factorization.

28919071365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060021.

The product of its (nonzero) digits is 816480, while the sum is 51.

The spelling of 28919071365 in words is "twenty-eight billion, nine hundred nineteen million, seventy-one thousand, three hundred sixty-five".