28016765730 has 64 divisors (see below), whose sum is σ = 77287651200. Its totient is φ = 7213510080.

The previous prime is 28016765729. The next prime is 28016765737. The reversal of 28016765730 is 3756761082.

28016765730 is a `hidden beast` number, since 2 + 8 + 0 + 1 + 6 + 76 + 573 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (28016765737) 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 31 ways as a sum of consecutive naturals, for example, 1781236 + ... + 1796895.

It is an arithmetic number, because the mean of its divisors is an integer number (1207619550).

Almost surely, 2^28016765730 is an apocalyptic number.

28016765730 is an abundant number, since it is smaller than the sum of its proper divisors (49270885470).

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

28016765730 is a wasteful number, since it uses less digits than its factorization.

28016765730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3578176 (or 3578170 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 28016765730 in words is "twenty-eight billion, sixteen million, seven hundred sixty-five thousand, seven hundred thirty".