28008770438 has 32 divisors (see below), whose sum is σ = 46049160960. Its totient is φ = 12671179360.

The previous prime is 28008770417. The next prime is 28008770453. The reversal of 28008770438 is 83407780082.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28008770392 and 28008770401.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 10859033 + ... + 10861611.

It is an arithmetic number, because the mean of its divisors is an integer number (1439036280).

Almost surely, 2^28008770438 is an apocalyptic number.

28008770438 is a deficient number, since it is larger than the sum of its proper divisors (18040390522).

28008770438 is a wasteful number, since it uses less digits than its factorization.

28008770438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4732.

The product of its (nonzero) digits is 602112, while the sum is 47.

The spelling of 28008770438 in words is "twenty-eight billion, eight million, seven hundred seventy thousand, four hundred thirty-eight".