28739564564 has 6 divisors (see below), whose sum is σ = 50294237994. Its totient is φ = 14369782280.

The previous prime is 28739564551. The next prime is 28739564569. The reversal of 28739564564 is 46546593782.

It can be written as a sum of positive squares in only one way, i.e., 26539016464 + 2200548100 = 162908^2 + 46910^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28739564569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3592445567 + ... + 3592445574.

It is an arithmetic number, because the mean of its divisors is an integer number (8382372999).

Almost surely, 2^28739564564 is an apocalyptic number.

It is an amenable number.

28739564564 is a deficient number, since it is larger than the sum of its proper divisors (21554673430).

28739564564 is a wasteful number, since it uses less digits than its factorization.

28739564564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7184891145 (or 7184891143 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 59.

The spelling of 28739564564 in words is "twenty-eight billion, seven hundred thirty-nine million, five hundred sixty-four thousand, five hundred sixty-four".