28147959309 has 16 divisors (see below), whose sum is σ = 38826324288. Its totient is φ = 18124854912.

The previous prime is 28147959299. The next prime is 28147959311. The reversal of 28147959309 is 90395974182.

It is not a de Polignac number, because 28147959309 - 2¹¹ = 28147957261 is a prime.

It is a super-2 number, since 2×28147959309² (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 (28147959319) 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, 910287 + ... + 940700.

It is an arithmetic number, because the mean of its divisors is an integer number (2426645268).

Almost surely, 2^28147959309 is an apocalyptic number.

It is an amenable number.

28147959309 is a deficient number, since it is larger than the sum of its proper divisors (10678364979).

28147959309 is a wasteful number, since it uses less digits than its factorization.

28147959309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851164.

The product of its (nonzero) digits is 4898880, while the sum is 57.

The spelling of 28147959309 in words is "twenty-eight billion, one hundred forty-seven million, nine hundred fifty-nine thousand, three hundred nine".