28100028494916 has 135 divisors (see below), whose sum is σ = 85454366524527. Its totient is φ = 8028388735920.

The previous prime is 28100028494893. The next prime is 28100028494969. The reversal of 28100028494916 is 61949482000182.

It is a happy number.

The square root of 28100028494916 is 5300946.

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

28100028494916 is a `hidden beast` number, since 2 + 8 + 100 + 0 + 2 + 8 + 49 + 491 + 6 = 666.

It is a super-2 number, since 2×28100028494916² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 667898161 + ... + 667940231.

Almost surely, 2^{28100028494916} is an apocalyptic number.

28100028494916 is the 5300946-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28100028494916

28100028494916 is an abundant number, since it is smaller than the sum of its proper divisors (57354338029611).

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

28100028494916 is an frugal number, since it uses more digits than its factorization.

28100028494916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84172 (or 42083 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 28100028494916 in words is "twenty-eight trillion, one hundred billion, twenty-eight million, four hundred ninety-four thousand, nine hundred sixteen".