28021209486 has 32 divisors (see below), whose sum is σ = 57178154880. Its totient is φ = 9152146656.

The previous prime is 28021209479. The next prime is 28021209493. The reversal of 28021209486 is 68490212082.

It is an interprime number because it is at equal distance from previous prime (28021209479) and next prime (28021209493).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 20241 + ... + 237596.

It is an arithmetic number, because the mean of its divisors is an integer number (1786817340).

Almost surely, 2^28021209486 is an apocalyptic number.

28021209486 is an abundant number, since it is smaller than the sum of its proper divisors (29156945394).

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

28021209486 is a wasteful number, since it uses less digits than its factorization.

28021209486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258208.

The product of its (nonzero) digits is 110592, while the sum is 42.

The spelling of 28021209486 in words is "twenty-eight billion, twenty-one million, two hundred nine thousand, four hundred eighty-six".