28473378407 has 4 divisors (see below), whose sum is σ = 28578446496. Its totient is φ = 28368310320.

The previous prime is 28473378391. The next prime is 28473378419. The reversal of 28473378407 is 70487337482.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28473378407 - 2⁴ = 28473378391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28473378467) 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, 52533638 + ... + 52534179.

It is an arithmetic number, because the mean of its divisors is an integer number (7144611624).

Almost surely, 2^28473378407 is an apocalyptic number.

28473378407 is a deficient number, since it is larger than the sum of its proper divisors (105068089).

28473378407 is a wasteful number, since it uses less digits than its factorization.

28473378407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105068088.

The product of its (nonzero) digits is 6322176, while the sum is 53.

The spelling of 28473378407 in words is "twenty-eight billion, four hundred seventy-three million, three hundred seventy-eight thousand, four hundred seven".