28281814424 has 8 divisors (see below), whose sum is σ = 53028402060. Its totient is φ = 14140907208.

The previous prime is 28281814423. The next prime is 28281814453. The reversal of 28281814424 is 42441818282.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×28281814424² (a number of 22 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28281814423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1767613394 + ... + 1767613409.

Almost surely, 2^28281814424 is an apocalyptic number.

It is an amenable number.

28281814424 is a deficient number, since it is larger than the sum of its proper divisors (24746587636).

28281814424 is a wasteful number, since it uses less digits than its factorization.

28281814424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3535226809 (or 3535226805 counting only the distinct ones).

The product of its digits is 262144, while the sum is 44.

The spelling of 28281814424 in words is "twenty-eight billion, two hundred eighty-one million, eight hundred fourteen thousand, four hundred twenty-four".