28426388394 has 8 divisors (see below), whose sum is σ = 56852776800. Its totient is φ = 9475462796.

The previous prime is 28426388311. The next prime is 28426388407. The reversal of 28426388394 is 49388362482.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

28426388394 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2368865694 + ... + 2368865705.

It is an arithmetic number, because the mean of its divisors is an integer number (7106597100).

Almost surely, 2^28426388394 is an apocalyptic number.

28426388394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28426388394 is a wasteful number, since it uses less digits than its factorization.

28426388394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4737731404.

The product of its digits is 15925248, while the sum is 57.

The spelling of 28426388394 in words is "twenty-eight billion, four hundred twenty-six million, three hundred eighty-eight thousand, three hundred ninety-four".