28207086248220 has 48 divisors (see below), whose sum is σ = 86159827087488. Its totient is φ = 6838081514560.

The previous prime is 28207086248213. The next prime is 28207086248227. The reversal of 28207086248220 is 2284268070282.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28207086248213) and next prime (28207086248227).

It is a super-2 number, since 2×28207086248220² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28207086248227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21369004074 + ... + 21369005393.

It is an arithmetic number, because the mean of its divisors is an integer number (1794996397656).

Almost surely, 2^{28207086248220} is an apocalyptic number.

28207086248220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28207086248220 is an abundant number, since it is smaller than the sum of its proper divisors (57952740839268).

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

28207086248220 is a wasteful number, since it uses less digits than its factorization.

28207086248220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42738009490 (or 42738009488 counting only the distinct ones).

The product of its (nonzero) digits is 2752512, while the sum is 51.

The spelling of 28207086248220 in words is "twenty-eight trillion, two hundred seven billion, eighty-six million, two hundred forty-eight thousand, two hundred twenty".