28686969360 has 240 divisors, whose sum is σ = 113900567040. Its totient is φ = 6330885120.

The previous prime is 28686969313. The next prime is 28686969373. The reversal of 28686969360 is 6396968682.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×28686969360² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48025 + ... + 244295.

It is an arithmetic number, because the mean of its divisors is an integer number (474585696).

Almost surely, 2^28686969360 is an apocalyptic number.

28686969360 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 28686969360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56950283520).

28686969360 is an abundant number, since it is smaller than the sum of its proper divisors (85213597680).

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

28686969360 is a wasteful number, since it uses less digits than its factorization.

28686969360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196326 (or 196317 counting only the distinct ones).

The product of its (nonzero) digits is 40310784, while the sum is 63.

The spelling of 28686969360 in words is "twenty-eight billion, six hundred eighty-six million, nine hundred sixty-nine thousand, three hundred sixty".