28907023633 has 8 divisors (see below), whose sum is σ = 29781960552. Its totient is φ = 28037016576.

The previous prime is 28907023597. The next prime is 28907023657. The reversal of 28907023633 is 33632070982.

It can be written as a sum of positive squares in 4 ways, for example, as 6911760769 + 21995262864 = 83137^2 + 148308^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28907023633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28907023633.

It is not an unprimeable number, because it can be changed into a prime (28907026633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1220560 + ... + 1244017.

It is an arithmetic number, because the mean of its divisors is an integer number (3722745069).

Almost surely, 2^28907023633 is an apocalyptic number.

It is an amenable number.

28907023633 is a deficient number, since it is larger than the sum of its proper divisors (874936919).

28907023633 is a wasteful number, since it uses less digits than its factorization.

28907023633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2464931.

The product of its (nonzero) digits is 326592, while the sum is 43.

The spelling of 28907023633 in words is "twenty-eight billion, nine hundred seven million, twenty-three thousand, six hundred thirty-three".