28775285403984 has 120 divisors (see below), whose sum is σ = 92037179100672. Its totient is φ = 8221336738560.

The previous prime is 28775285403973. The next prime is 28775285404027. The reversal of 28775285403984 is 48930458257782.

28775285403984 is a `hidden beast` number, since 2 + 8 + 7 + 7 + 52 + 85 + 403 + 98 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

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 23 ways as a sum of consecutive naturals, for example, 52033089 + ... + 52583199.

Almost surely, 2^{28775285403984} is an apocalyptic number.

28775285403984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28775285403984 is an abundant number, since it is smaller than the sum of its proper divisors (63261893696688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28775285403984 is a wasteful number, since it uses less digits than its factorization.

28775285403984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602025 (or 602016 counting only the distinct ones).

The product of its (nonzero) digits is 1083801600, while the sum is 72.

The spelling of 28775285403984 in words is "twenty-eight trillion, seven hundred seventy-five billion, two hundred eighty-five million, four hundred three thousand, nine hundred eighty-four".