28022386140 has 144 divisors (see below), whose sum is σ = 100278097920. Its totient is φ = 6198491520.

The previous prime is 28022386129. The next prime is 28022386141. The reversal of 28022386140 is 4168322082.

28022386140 is a `hidden beast` number, since 2 + 8 + 0 + 2 + 2 + 38 + 614 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28022386095 and 28022386104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28022386141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 319650 + ... + 397769.

It is an arithmetic number, because the mean of its divisors is an integer number (696375680).

Almost surely, 2^28022386140 is an apocalyptic number.

28022386140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28022386140 is an abundant number, since it is smaller than the sum of its proper divisors (72255711780).

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

28022386140 is a wasteful number, since it uses less digits than its factorization.

28022386140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717472 (or 717467 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 28022386140 in words is "twenty-eight billion, twenty-two million, three hundred eighty-six thousand, one hundred forty".