28028352460761 has 9 divisors (see below), whose sum is σ = 40485420940341. Its totient is φ = 18685557718812.

The previous prime is 28028352460721. The next prime is 28028352460769. The reversal of 28028352460761 is 16706425382082.

The square root of 28028352460761 is 5294181.

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

28028352460761 is a `hidden beast` number, since 2 + 8 + 0 + 2 + 8 + 3 + 5 + 24 + 607 + 6 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 28028352460761 - 2²⁷ = 28028218243033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28028352460698 and 28028352460707.

It is not an unprimeable number, because it can be changed into a prime (28028352460769) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15000180 + ... + 16764906.

Almost surely, 2^{28028352460761} is an apocalyptic number.

28028352460761 is the 5294181-st square number.

28028352460761 is the 2647091-st centered octagonal number.

It is an amenable number.

28028352460761 is a deficient number, since it is larger than the sum of its proper divisors (12457068479580).

28028352460761 is an frugal number, since it uses more digits than its factorization.

28028352460761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3529460 (or 1764730 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 54.

The spelling of 28028352460761 in words is "twenty-eight trillion, twenty-eight billion, three hundred fifty-two million, four hundred sixty thousand, seven hundred sixty-one".