28754565840 has 1800 divisors, whose sum is σ = 140230024704. Its totient is φ = 5337446400.

The previous prime is 28754565803. The next prime is 28754565859. The reversal of 28754565840 is 4856545782.

28754565840 is a `hidden beast` number, since 2 + 8 + 7 + 5 + 4 + 56 + 584 + 0 = 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 359 ways as a sum of consecutive naturals, for example, 927566625 + ... + 927566655.

Almost surely, 2^28754565840 is an apocalyptic number.

28754565840 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 28754565840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70115012352).

28754565840 is an abundant number, since it is smaller than the sum of its proper divisors (111475458864).

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

28754565840 is a wasteful number, since it uses less digits than its factorization.

28754565840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 10752000, while the sum is 54.

The spelling of 28754565840 in words is "twenty-eight billion, seven hundred fifty-four million, five hundred sixty-five thousand, eight hundred forty".