28390527805 has 8 divisors (see below), whose sum is σ = 34091992800. Its totient is φ = 22696849296.

The previous prime is 28390527797. The next prime is 28390527821. The reversal of 28390527805 is 50872509382.

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

It is a cyclic number.

It is not a de Polignac number, because 28390527805 - 2³ = 28390527797 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1938595 + ... + 1953184.

It is an arithmetic number, because the mean of its divisors is an integer number (4261499100).

Almost surely, 2^28390527805 is an apocalyptic number.

It is an amenable number.

28390527805 is a deficient number, since it is larger than the sum of its proper divisors (5701464995).

28390527805 is a wasteful number, since it uses less digits than its factorization.

28390527805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3893243.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 28390527805 in words is "twenty-eight billion, three hundred ninety million, five hundred twenty-seven thousand, eight hundred five".