28747555408 has 240 divisors, whose sum is σ = 71119823040. Its totient is φ = 11060582400.

The previous prime is 28747555349. The next prime is 28747555433. The reversal of 28747555408 is 80455574782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 226358641 + ... + 226358767.

It is an arithmetic number, because the mean of its divisors is an integer number (296332596).

Almost surely, 2^28747555408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28747555408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35559911520).

28747555408 is an abundant number, since it is smaller than the sum of its proper divisors (42372267632).

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

28747555408 is a wasteful number, since it uses less digits than its factorization.

28747555408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 12544000, while the sum is 55.

The spelling of 28747555408 in words is "twenty-eight billion, seven hundred forty-seven million, five hundred fifty-five thousand, four hundred eight".