28870979819 has 18 divisors (see below), whose sum is σ = 32288141340. Its totient is φ = 25788661800.

The previous prime is 28870979749. The next prime is 28870979821. The reversal of 28870979819 is 91897907882.

It is not a de Polignac number, because 28870979819 - 2¹⁶ = 28870914283 is a prime.

It is a super-2 number, since 2×28870979819² (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 (28870979869) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14355524 + ... + 14357534.

It is an arithmetic number, because the mean of its divisors is an integer number (1793785630).

Almost surely, 2^28870979819 is an apocalyptic number.

28870979819 is a deficient number, since it is larger than the sum of its proper divisors (3417161521).

28870979819 is an frugal number, since it uses more digits than its factorization.

28870979819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4103 (or 2081 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 68.

The spelling of 28870979819 in words is "twenty-eight billion, eight hundred seventy million, nine hundred seventy-nine thousand, eight hundred nineteen".