28213063680 has 416 divisors, whose sum is σ = 94454680320. Its totient is φ = 7184056320.

The previous prime is 28213063657. The next prime is 28213063687. The reversal of 28213063680 is 8636031282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28213063687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155873190 + ... + 155873370.

It is an arithmetic number, because the mean of its divisors is an integer number (227054520).

Almost surely, 2^28213063680 is an apocalyptic number.

28213063680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28213063680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47227340160).

28213063680 is an abundant number, since it is smaller than the sum of its proper divisors (66241616640).

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

28213063680 is a wasteful number, since it uses less digits than its factorization.

28213063680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 28213063680 in words is "twenty-eight billion, two hundred thirteen million, sixty-three thousand, six hundred eighty".