28442140715 has 4 divisors (see below), whose sum is σ = 34130568864. Its totient is φ = 22753712568.

The previous prime is 28442140703. The next prime is 28442140723. The reversal of 28442140715 is 51704124482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28442140715 is a prime.

It is a super-2 number, since 2×28442140715² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2844214067 + ... + 2844214076.

It is an arithmetic number, because the mean of its divisors is an integer number (8532642216).

Almost surely, 2^28442140715 is an apocalyptic number.

28442140715 is a deficient number, since it is larger than the sum of its proper divisors (5688428149).

28442140715 is an equidigital number, since it uses as much as digits as its factorization.

28442140715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5688428148.

The product of its (nonzero) digits is 71680, while the sum is 38.

The spelling of 28442140715 in words is "twenty-eight billion, four hundred forty-two million, one hundred forty thousand, seven hundred fifteen".