28078734037 has 4 divisors (see below), whose sum is σ = 28084311360. Its totient is φ = 28073156716.

The previous prime is 28078734023. The next prime is 28078734053. The reversal of 28078734037 is 73043787082.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28078734037 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28078734007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2781103 + ... + 2791180.

It is an arithmetic number, because the mean of its divisors is an integer number (7021077840).

Almost surely, 2^28078734037 is an apocalyptic number.

It is an amenable number.

28078734037 is a deficient number, since it is larger than the sum of its proper divisors (5577323).

28078734037 is an equidigital number, since it uses as much as digits as its factorization.

28078734037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5577322.

The product of its (nonzero) digits is 1580544, while the sum is 49.

The spelling of 28078734037 in words is "twenty-eight billion, seventy-eight million, seven hundred thirty-four thousand, thirty-seven".