28105279290 has 64 divisors (see below), whose sum is σ = 81760821120. Its totient is φ = 6813400320.

The previous prime is 28105279277. The next prime is 28105279333. The reversal of 28105279290 is 9297250182.

It is a happy number.

28105279290 is a `hidden beast` number, since 28 + 10 + 527 + 9 + 2 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4728559 + ... + 4734498.

It is an arithmetic number, because the mean of its divisors is an integer number (1277512830).

Almost surely, 2^28105279290 is an apocalyptic number.

28105279290 is an abundant number, since it is smaller than the sum of its proper divisors (53655541830).

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

28105279290 is a wasteful number, since it uses less digits than its factorization.

28105279290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9463084 (or 9463078 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 28105279290 in words is "twenty-eight billion, one hundred five million, two hundred seventy-nine thousand, two hundred ninety".