28110420461 has 4 divisors (see below), whose sum is σ = 28113126300. Its totient is φ = 28107714624.

The previous prime is 28110420433. The next prime is 28110420493. The reversal of 28110420461 is 16402401182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25449820900 + 2660599561 = 159530^2 + 51581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28110420461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28110420361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1337276 + ... + 1358133.

It is an arithmetic number, because the mean of its divisors is an integer number (7028281575).

Almost surely, 2^28110420461 is an apocalyptic number.

It is an amenable number.

28110420461 is a deficient number, since it is larger than the sum of its proper divisors (2705839).

28110420461 is a wasteful number, since it uses less digits than its factorization.

28110420461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705838.

The product of its (nonzero) digits is 3072, while the sum is 29.

The spelling of 28110420461 in words is "twenty-eight billion, one hundred ten million, four hundred twenty thousand, four hundred sixty-one".