28315465984 has 81 divisors (see below), whose sum is σ = 61278227283. Its totient is φ = 13052522496.

The previous prime is 28315465949. The next prime is 28315466009. The reversal of 28315465984 is 48956451382.

The square root of 28315465984 is 168272.

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 48441600 + 28267024384 = 6960^2 + 168128^2 .

It is a super-2 number, since 2×28315465984² (a number of 22 digits) contains 22 as substring.

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, 35000172 + ... + 35000980.

Almost surely, 2^28315465984 is an apocalyptic number.

28315465984 is the 168272-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28315465984

28315465984 is an abundant number, since it is smaller than the sum of its proper divisors (32962761299).

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

28315465984 is an frugal number, since it uses more digits than its factorization.

28315465984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660 (or 824 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 55.

The spelling of 28315465984 in words is "twenty-eight billion, three hundred fifteen million, four hundred sixty-five thousand, nine hundred eighty-four".