28939851504 has 80 divisors (see below), whose sum is σ = 83674599840. Its totient is φ = 9576184320.

The previous prime is 28939851503. The next prime is 28939851527. The reversal of 28939851504 is 40515893982.

28939851504 is a `hidden beast` number, since 2 + 89 + 3 + 9 + 8 + 51 + 504 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28939851503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185307 + ... + 303674.

It is an arithmetic number, because the mean of its divisors is an integer number (1045932498).

Almost surely, 2^28939851504 is an apocalyptic number.

28939851504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28939851504 is an abundant number, since it is smaller than the sum of its proper divisors (54734748336).

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

28939851504 is a wasteful number, since it uses less digits than its factorization.

28939851504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489135 (or 489123 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The spelling of 28939851504 in words is "twenty-eight billion, nine hundred thirty-nine million, eight hundred fifty-one thousand, five hundred four".