28488843461 has 4 divisors (see below), whose sum is σ = 30680292972. Its totient is φ = 26297393952.

The previous prime is 28488843437. The next prime is 28488843463. The reversal of 28488843461 is 16434888482.

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 19483972225 + 9004871236 = 139585^2 + 94894^2 .

It is a cyclic number.

It is not a de Polignac number, because 28488843461 - 2²² = 28484649157 is a prime.

It is a super-2 number, since 2×28488843461² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28488843397 and 28488843406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28488843463) 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, 1095724736 + ... + 1095724761.

It is an arithmetic number, because the mean of its divisors is an integer number (7670073243).

Almost surely, 2^28488843461 is an apocalyptic number.

It is an amenable number.

28488843461 is a deficient number, since it is larger than the sum of its proper divisors (2191449511).

28488843461 is a wasteful number, since it uses less digits than its factorization.

28488843461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191449510.

The product of its digits is 9437184, while the sum is 56.

The spelling of 28488843461 in words is "twenty-eight billion, four hundred eighty-eight million, eight hundred forty-three thousand, four hundred sixty-one".