28478723210116 has 27 divisors (see below), whose sum is σ = 49949428550679. Its totient is φ = 14207529108168.

The previous prime is 28478723210089. The next prime is 28478723210141. The reversal of 28478723210116 is 61101232787482.

It is a happy number.

The square root of 28478723210116 is 5336546.

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

It is a super-2 number, since 2×28478723210116² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5197793065 + ... + 5197798543.

Almost surely, 2^{28478723210116} is an apocalyptic number.

28478723210116 is the 5336546-th square number.

It is an amenable number.

28478723210116 is a deficient number, since it is larger than the sum of its proper divisors (21470705340563).

28478723210116 is an frugal number, since it uses more digits than its factorization.

28478723210116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11936 (or 5968 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 52.

Adding to 28478723210116 its reverse (61101232787482), we get a palindrome (89579955997598).

The spelling of 28478723210116 in words is "twenty-eight trillion, four hundred seventy-eight billion, seven hundred twenty-three million, two hundred ten thousand, one hundred sixteen".