28081455824 has 20 divisors (see below), whose sum is σ = 54549889536. Its totient is φ = 14004064992.

The previous prime is 28081455823. The next prime is 28081455841. The reversal of 28081455824 is 42855418082.

It is a super-2 number, since 2×28081455824² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28081455823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2285114 + ... + 2297369.

Almost surely, 2^28081455824 is an apocalyptic number.

It is an amenable number.

28081455824 is a deficient number, since it is larger than the sum of its proper divisors (26468433712).

28081455824 is a wasteful number, since it uses less digits than its factorization.

28081455824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4582874 (or 4582868 counting only the distinct ones).

The product of its (nonzero) digits is 819200, while the sum is 47.

The spelling of 28081455824 in words is "twenty-eight billion, eighty-one million, four hundred fifty-five thousand, eight hundred twenty-four".