28707506907 has 16 divisors (see below), whose sum is σ = 38636616480. Its totient is φ = 18958447872.

The previous prime is 28707506897. The next prime is 28707506917. The reversal of 28707506907 is 70960570782.

It is an interprime number because it is at equal distance from previous prime (28707506897) and next prime (28707506917).

It is not a de Polignac number, because 28707506907 - 2¹⁴ = 28707490523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28707506907.

It is not an unprimeable number, because it can be changed into a prime (28707506917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2136133 + ... + 2149529.

It is an arithmetic number, because the mean of its divisors is an integer number (2414788530).

Almost surely, 2^28707506907 is an apocalyptic number.

28707506907 is a deficient number, since it is larger than the sum of its proper divisors (9929109573).

28707506907 is a wasteful number, since it uses less digits than its factorization.

28707506907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20062.

The product of its (nonzero) digits is 1481760, while the sum is 51.

The spelling of 28707506907 in words is "twenty-eight billion, seven hundred seven million, five hundred six thousand, nine hundred seven".