28762880861 has 8 divisors (see below), whose sum is σ = 33791356704. Its totient is φ = 24136683120.

The previous prime is 28762880837. The next prime is 28762880863. The reversal of 28762880861 is 16808826782.

It is a happy number.

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

It is not a de Polignac number, because 28762880861 - 2²² = 28758686557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28762880797 and 28762880806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28762880863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100569371 + ... + 100569656.

It is an arithmetic number, because the mean of its divisors is an integer number (4223919588).

Almost surely, 2^28762880861 is an apocalyptic number.

It is an amenable number.

28762880861 is a deficient number, since it is larger than the sum of its proper divisors (5028475843).

28762880861 is a wasteful number, since it uses less digits than its factorization.

28762880861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201139051.

The product of its (nonzero) digits is 4128768, while the sum is 56.

The spelling of 28762880861 in words is "twenty-eight billion, seven hundred sixty-two million, eight hundred eighty thousand, eight hundred sixty-one".