28807461761 has 8 divisors (see below), whose sum is σ = 31061779560. Its totient is φ = 26558623872.

The previous prime is 28807461719. The next prime is 28807461803. The reversal of 28807461761 is 16716470882.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28807461719) and next prime (28807461803).

It can be written as a sum of positive squares in 4 ways, for example, as 13572250000 + 15235211761 = 116500^2 + 123431^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28807461761 - 2³⁴ = 11627592577 is a prime.

It is a super-2 number, since 2×28807461761² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28807461701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1359050 + ... + 1380083.

It is an arithmetic number, because the mean of its divisors is an integer number (3882722445).

Almost surely, 2^28807461761 is an apocalyptic number.

It is an amenable number.

28807461761 is a deficient number, since it is larger than the sum of its proper divisors (2254317799).

28807461761 is a wasteful number, since it uses less digits than its factorization.

28807461761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2739955.

The product of its (nonzero) digits is 903168, while the sum is 50.

The spelling of 28807461761 in words is "twenty-eight billion, eight hundred seven million, four hundred sixty-one thousand, seven hundred sixty-one".