28069764621 has 8 divisors (see below), whose sum is σ = 37483669920. Its totient is φ = 18684517872.

The previous prime is 28069764607. The next prime is 28069764629. The reversal of 28069764621 is 12646796082.

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

It is a de Polignac number, because none of the positive numbers 2^k-28069764621 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28069764629) 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, 7162351 + ... + 7166268.

It is an arithmetic number, because the mean of its divisors is an integer number (4685458740).

Almost surely, 2^28069764621 is an apocalyptic number.

It is an amenable number.

28069764621 is a deficient number, since it is larger than the sum of its proper divisors (9413905299).

28069764621 is a wasteful number, since it uses less digits than its factorization.

28069764621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14329275.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 28069764621 in words is "twenty-eight billion, sixty-nine million, seven hundred sixty-four thousand, six hundred twenty-one".