28978709973 has 8 divisors (see below), whose sum is σ = 38640854208. Its totient is φ = 19317852864.

The previous prime is 28978709957. The next prime is 28978710001. The reversal of 28978709973 is 37990787982.

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

It is not a de Polignac number, because 28978709973 - 2⁴ = 28978709957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28978709898 and 28978709907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28978709873) 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, 267961 + ... + 360222.

It is an arithmetic number, because the mean of its divisors is an integer number (4830106776).

Almost surely, 2^28978709973 is an apocalyptic number.

It is an amenable number.

28978709973 is a deficient number, since it is larger than the sum of its proper divisors (9662144235).

28978709973 is a wasteful number, since it uses less digits than its factorization.

28978709973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643563.

The product of its (nonzero) digits is 96018048, while the sum is 69.

The spelling of 28978709973 in words is "twenty-eight billion, nine hundred seventy-eight million, seven hundred nine thousand, nine hundred seventy-three".