28998720422116 has 27 divisors (see below), whose sum is σ = 51247201322793. Its totient is φ = 14358040448880.

The previous prime is 28998720422099. The next prime is 28998720422129. The reversal of 28998720422116 is 61122402789982.

It is a happy number.

The square root of 28998720422116 is 5385046.

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

It can be written as a sum of positive squares in only one way, i.e., 20369461668516 + 8629258753600 = 4513254^2 + 2937560^2 .

It is a super-2 number, since 2×28998720422116² (a number of 28 digits) contains 22 as substring.

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, 1109306406 + ... + 1109332546.

Almost surely, 2^{28998720422116} is an apocalyptic number.

28998720422116 is the 5385046-th square number.

It is an amenable number.

28998720422116 is a deficient number, since it is larger than the sum of its proper divisors (22248480900677).

28998720422116 is an frugal number, since it uses more digits than its factorization.

28998720422116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52492 (or 26246 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 61.

The spelling of 28998720422116 in words is "twenty-eight trillion, nine hundred ninety-eight billion, seven hundred twenty million, four hundred twenty-two thousand, one hundred sixteen".