28369856340 has 216 divisors, whose sum is σ = 103813530912. Its totient is φ = 6484484160.

The previous prime is 28369856321. The next prime is 28369856341. The reversal of 28369856340 is 4365896382.

28369856340 is a `hidden beast` number, since 2 + 8 + 36 + 9 + 8 + 563 + 40 = 666.

It is a Smith number, since the sum of its digits (54) 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 (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28369856341) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 178575 + ... + 297705.

Almost surely, 2^28369856340 is an apocalyptic number.

28369856340 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 28369856340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51906765456).

28369856340 is an abundant number, since it is smaller than the sum of its proper divisors (75443674572).

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

28369856340 is a wasteful number, since it uses less digits than its factorization.

28369856340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119169 (or 119148 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 28369856340 in words is "twenty-eight billion, three hundred sixty-nine million, eight hundred fifty-six thousand, three hundred forty".