28976063881 has 4 divisors (see below), whose sum is σ = 28977680512. Its totient is φ = 28974447252.

The previous prime is 28976063873. The next prime is 28976063891. The reversal of 28976063881 is 18836067982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28976063881 - 2³ = 28976063873 is a prime.

It is a super-2 number, since 2×28976063881² (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 (28976063891) 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, 781125 + ... + 817378.

It is an arithmetic number, because the mean of its divisors is an integer number (7244420128).

Almost surely, 2^28976063881 is an apocalyptic number.

It is an amenable number.

28976063881 is a deficient number, since it is larger than the sum of its proper divisors (1616631).

28976063881 is a wasteful number, since it uses less digits than its factorization.

28976063881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616630.

The product of its (nonzero) digits is 6967296, while the sum is 58.

The spelling of 28976063881 in words is "twenty-eight billion, nine hundred seventy-six million, sixty-three thousand, eight hundred eighty-one".