28107554784 has 48 divisors (see below), whose sum is σ = 73792473552. Its totient is φ = 9367897088.

The previous prime is 28107554767. The next prime is 28107554789. The reversal of 28107554784 is 48745570182.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×28107554784² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28107554789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 899812 + ... + 930524.

It is an arithmetic number, because the mean of its divisors is an integer number (1537343199).

Almost surely, 2^28107554784 is an apocalyptic number.

28107554784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28107554784 is an abundant number, since it is smaller than the sum of its proper divisors (45684918768).

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

28107554784 is a wasteful number, since it uses less digits than its factorization.

28107554784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40259 (or 40251 counting only the distinct ones).

The product of its (nonzero) digits is 2508800, while the sum is 51.

The spelling of 28107554784 in words is "twenty-eight billion, one hundred seven million, five hundred fifty-four thousand, seven hundred eighty-four".