28973259861 has 16 divisors (see below), whose sum is σ = 47545862784. Its totient is φ = 15282598464.

The previous prime is 28973259841. The next prime is 28973259899. The reversal of 28973259861 is 16895237982.

It is not a de Polignac number, because 28973259861 - 2⁵ = 28973259829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28973259795 and 28973259804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28973259811) 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, 53064306 + ... + 53064851.

It is an arithmetic number, because the mean of its divisors is an integer number (2971616424).

Almost surely, 2^28973259861 is an apocalyptic number.

28973259861 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28973259861 is a deficient number, since it is larger than the sum of its proper divisors (18572602923).

28973259861 is a wasteful number, since it uses less digits than its factorization.

28973259861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106129180.

The product of its digits is 13063680, while the sum is 60.

The spelling of 28973259861 in words is "twenty-eight billion, nine hundred seventy-three million, two hundred fifty-nine thousand, eight hundred sixty-one".