28812005670 has 32 divisors (see below), whose sum is σ = 79027216128. Its totient is φ = 6585601248.

The previous prime is 28812005641. The next prime is 28812005681. The reversal of 28812005670 is 7650021882.

It is a super-2 number, since 2×28812005670² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68599804 + ... + 68600223.

It is an arithmetic number, because the mean of its divisors is an integer number (2469600504).

Almost surely, 2^28812005670 is an apocalyptic number.

28812005670 is an abundant number, since it is smaller than the sum of its proper divisors (50215210458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28812005670 is a wasteful number, since it uses less digits than its factorization.

28812005670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137200044.

The product of its (nonzero) digits is 53760, while the sum is 39.

The spelling of 28812005670 in words is "twenty-eight billion, eight hundred twelve million, five thousand, six hundred seventy".