28984381504 has 63 divisors (see below), whose sum is σ = 62318580087. Its totient is φ = 13369234944.

The previous prime is 28984381493. The next prime is 28984381549. The reversal of 28984381504 is 40518348982.

The square root of 28984381504 is 170248.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 20549795904 + 8434585600 = 143352^2 + 91840^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17704974 + ... + 17706610.

Almost surely, 2^28984381504 is an apocalyptic number.

28984381504 is the 170248-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28984381504

28984381504 is an abundant number, since it is smaller than the sum of its proper divisors (33334198583).

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

28984381504 is an frugal number, since it uses more digits than its factorization.

28984381504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3312 (or 1652 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 52.

The spelling of 28984381504 in words is "twenty-eight billion, nine hundred eighty-four million, three hundred eighty-one thousand, five hundred four".