28058916909 has 8 divisors (see below), whose sum is σ = 37424376000. Its totient is φ = 18699701216.

The previous prime is 28058916901. The next prime is 28058916913. The reversal of 28058916909 is 90961985082.

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

It is a cyclic number.

It is not a de Polignac number, because 28058916909 - 2³ = 28058916901 is a prime.

It is a super-2 number, since 2×28058916909² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28058916901) 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, 1550352 + ... + 1568345.

It is an arithmetic number, because the mean of its divisors is an integer number (4678047000).

Almost surely, 2^28058916909 is an apocalyptic number.

It is an amenable number.

28058916909 is a deficient number, since it is larger than the sum of its proper divisors (9365459091).

28058916909 is a wasteful number, since it uses less digits than its factorization.

28058916909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3121699.

The product of its (nonzero) digits is 2799360, while the sum is 57.

The spelling of 28058916909 in words is "twenty-eight billion, fifty-eight million, nine hundred sixteen thousand, nine hundred nine".