28718303977 has 16 divisors (see below), whose sum is σ = 32994244800. Its totient is φ = 24721251840.

The previous prime is 28718303959. The next prime is 28718303981. The reversal of 28718303977 is 77930381782.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28718303977 is a prime.

It is a super-3 number, since 3×28718303977³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28718303927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403713 + ... + 469489.

It is an arithmetic number, because the mean of its divisors is an integer number (2062140300).

Almost surely, 2^28718303977 is an apocalyptic number.

It is an amenable number.

28718303977 is a deficient number, since it is larger than the sum of its proper divisors (4275940823).

28718303977 is a wasteful number, since it uses less digits than its factorization.

28718303977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67896.

The product of its (nonzero) digits is 3556224, while the sum is 55.

The spelling of 28718303977 in words is "twenty-eight billion, seven hundred eighteen million, three hundred three thousand, nine hundred seventy-seven".