28367547840 has 392 divisors, whose sum is σ = 101876169120. Its totient is φ = 7520200704.

The previous prime is 28367547833. The next prime is 28367547853. The reversal of 28367547840 is 4874576382.

28367547840 is a `hidden beast` number, since 28 + 36 + 7 + 547 + 8 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 64618341 + ... + 64618779.

Almost surely, 2^28367547840 is an apocalyptic number.

28367547840 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 28367547840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50938084560).

28367547840 is an abundant number, since it is smaller than the sum of its proper divisors (73508621280).

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

28367547840 is an equidigital number, since it uses as much as digits as its factorization.

28367547840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 54.

The spelling of 28367547840 in words is "twenty-eight billion, three hundred sixty-seven million, five hundred forty-seven thousand, eight hundred forty".