28706118840 has 576 divisors, whose sum is σ = 117080964000. Its totient is φ = 6061547520.

The previous prime is 28706118827. The next prime is 28706118853. The reversal of 28706118840 is 4881160782.

28706118840 is a `hidden beast` number, since 28 + 7 + 0 + 611 + 8 + 8 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (28706118827) and next prime (28706118853).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 13740516 + ... + 13742604.

Almost surely, 2^28706118840 is an apocalyptic number.

28706118840 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 28706118840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58540482000).

28706118840 is an abundant number, since it is smaller than the sum of its proper divisors (88374845160).

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

28706118840 is a wasteful number, since it uses less digits than its factorization.

28706118840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180 (or 2166 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The spelling of 28706118840 in words is "twenty-eight billion, seven hundred six million, one hundred eighteen thousand, eight hundred forty".