28054433940 has 384 divisors, whose sum is σ = 93315317760. Its totient is φ = 6231859200.

The previous prime is 28054433921. The next prime is 28054433941. The reversal of 28054433940 is 4933445082.

It is a junction number, because it is equal to n+sod(n) for n = 28054433892 and 28054433901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28054433941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 57137095 + ... + 57137585.

It is an arithmetic number, because the mean of its divisors is an integer number (243008640).

Almost surely, 2^28054433940 is an apocalyptic number.

28054433940 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 28054433940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46657658880).

28054433940 is an abundant number, since it is smaller than the sum of its proper divisors (65260883820).

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

28054433940 is a wasteful number, since it uses less digits than its factorization.

28054433940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 28054433940 in words is "twenty-eight billion, fifty-four million, four hundred thirty-three thousand, nine hundred forty".