28990529747 has 8 divisors (see below), whose sum is σ = 29788939632. Its totient is φ = 28192903200.

The previous prime is 28990529741. The next prime is 28990529759. The reversal of 28990529747 is 74792509982.

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-28990529747 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 28990529747.

It is not an unprimeable number, because it can be changed into a prime (28990529741) 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, 120404 + ... + 269217.

It is an arithmetic number, because the mean of its divisors is an integer number (3723617454).

Almost surely, 2^28990529747 is an apocalyptic number.

28990529747 is a deficient number, since it is larger than the sum of its proper divisors (798409885).

28990529747 is a wasteful number, since it uses less digits than its factorization.

28990529747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391669.

The product of its (nonzero) digits is 22861440, while the sum is 62.

The spelling of 28990529747 in words is "twenty-eight billion, nine hundred ninety million, five hundred twenty-nine thousand, seven hundred forty-seven".