28740759961 has 3 divisors (see below), whose sum is σ = 28740929493. Its totient is φ = 28740590430.

The previous prime is 28740759913. The next prime is 28740759977. The reversal of 28740759961 is 16995704782.

The square root of 28740759961 is 169531.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 28740759961 - 2¹⁹ = 28740235673 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28740759896 and 28740759905.

It is not an unprimeable number, because it can be changed into a prime (28740759461) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 84766 + ... + 254296.

It is an arithmetic number, because the mean of its divisors is an integer number (9580309831).

Almost surely, 2^28740759961 is an apocalyptic number.

28740759961 is the 169531-st square number.

28740759961 is the 84766-th centered octagonal number.

It is an amenable number.

28740759961 is a deficient number, since it is larger than the sum of its proper divisors (169532).

28740759961 is an frugal number, since it uses more digits than its factorization.

28740759961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339062 (or 169531 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 58.

The spelling of 28740759961 in words is "twenty-eight billion, seven hundred forty million, seven hundred fifty-nine thousand, nine hundred sixty-one".