28459807623 has 16 divisors (see below), whose sum is σ = 45405961440. Its totient is φ = 17513727552.

The previous prime is 28459807583. The next prime is 28459807657. The reversal of 28459807623 is 32670895482.

28459807623 is a `hidden beast` number, since 2 + 8 + 4 + 5 + 9 + 8 + 0 + 7 + 623 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-28459807623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28459807623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28459807823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40540686 + ... + 40541387.

It is an arithmetic number, because the mean of its divisors is an integer number (2837872590).

Almost surely, 2^28459807623 is an apocalyptic number.

28459807623 is a deficient number, since it is larger than the sum of its proper divisors (16946153817).

28459807623 is a wasteful number, since it uses less digits than its factorization.

28459807623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81082095 (or 81082089 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 28459807623 in words is "twenty-eight billion, four hundred fifty-nine million, eight hundred seven thousand, six hundred twenty-three".