28509296012 has 24 divisors (see below), whose sum is σ = 51059545152. Its totient is φ = 13920958800.

The previous prime is 28509295963. The next prime is 28509296201. The reversal of 28509296012 is 21069290582.

It is a super-3 number, since 3×28509296012³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1907087 + ... + 1921977.

It is an arithmetic number, because the mean of its divisors is an integer number (2127481048).

Almost surely, 2^28509296012 is an apocalyptic number.

It is an amenable number.

28509296012 is a deficient number, since it is larger than the sum of its proper divisors (22550249140).

28509296012 is a wasteful number, since it uses less digits than its factorization.

28509296012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26069 (or 26067 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 28509296012 in words is "twenty-eight billion, five hundred nine million, two hundred ninety-six thousand, twelve".