28056360664 has 32 divisors (see below), whose sum is σ = 54983531520. Its totient is φ = 13396100256.

The previous prime is 28056360637. The next prime is 28056360667. The reversal of 28056360664 is 46606365082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28056360667) 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, 13914 + ... + 237289.

It is an arithmetic number, because the mean of its divisors is an integer number (1718235360).

Almost surely, 2^28056360664 is an apocalyptic number.

It is an amenable number.

28056360664 is a deficient number, since it is larger than the sum of its proper divisors (26927170856).

28056360664 is a wasteful number, since it uses less digits than its factorization.

28056360664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251839 (or 251835 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 28056360664 in words is "twenty-eight billion, fifty-six million, three hundred sixty thousand, six hundred sixty-four".