28212124655 has 48 divisors (see below), whose sum is σ = 40199269152. Its totient is φ = 18880646400.

The previous prime is 28212124621. The next prime is 28212124657. The reversal of 28212124655 is 55642121282.

It is not a de Polignac number, because 28212124655 - 2²² = 28207930351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28212124657) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2597897 + ... + 2608733.

It is an arithmetic number, because the mean of its divisors is an integer number (837484774).

Almost surely, 2^28212124655 is an apocalyptic number.

28212124655 is a deficient number, since it is larger than the sum of its proper divisors (11987144497).

28212124655 is a wasteful number, since it uses less digits than its factorization.

28212124655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11208 (or 11197 counting only the distinct ones).

The product of its digits is 76800, while the sum is 38.

The spelling of 28212124655 in words is "twenty-eight billion, two hundred twelve million, one hundred twenty-four thousand, six hundred fifty-five".