28620824801 has 4 divisors (see below), whose sum is σ = 29865208512. Its totient is φ = 27376441092.

The previous prime is 28620824783. The next prime is 28620824807. The reversal of 28620824801 is 10842802682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28620824801 is a prime.

It is a super-2 number, since 2×28620824801² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28620824807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 622191821 + ... + 622191866.

It is an arithmetic number, because the mean of its divisors is an integer number (7466302128).

Almost surely, 2^28620824801 is an apocalyptic number.

It is an amenable number.

28620824801 is a deficient number, since it is larger than the sum of its proper divisors (1244383711).

28620824801 is a wasteful number, since it uses less digits than its factorization.

28620824801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244383710.

The product of its (nonzero) digits is 98304, while the sum is 41.

The spelling of 28620824801 in words is "twenty-eight billion, six hundred twenty million, eight hundred twenty-four thousand, eight hundred one".