28479821788 has 36 divisors (see below), whose sum is σ = 54838670656. Its totient is φ = 12932092800.

The previous prime is 28479821729. The next prime is 28479821803. The reversal of 28479821788 is 88712897482.

It is a super-2 number, since 2×28479821788² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 449956 + ... + 509332.

Almost surely, 2^28479821788 is an apocalyptic number.

It is an amenable number.

28479821788 is a deficient number, since it is larger than the sum of its proper divisors (26358848868).

28479821788 is a wasteful number, since it uses less digits than its factorization.

28479821788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60394 (or 60381 counting only the distinct ones).

The product of its digits is 28901376, while the sum is 64.

The spelling of 28479821788 in words is "twenty-eight billion, four hundred seventy-nine million, eight hundred twenty-one thousand, seven hundred eighty-eight".