28315749494 has 8 divisors (see below), whose sum is σ = 43843741248. Its totient is φ = 13701169080.

The previous prime is 28315749481. The next prime is 28315749523. The reversal of 28315749494 is 49494751382.

It is a happy number.

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

It is a super-2 number, since 2×28315749494² (a number of 22 digits) contains 22 as substring.

It is a congruent 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, 228352757 + ... + 228352880.

It is an arithmetic number, because the mean of its divisors is an integer number (5480467656).

Almost surely, 2^28315749494 is an apocalyptic number.

28315749494 is a deficient number, since it is larger than the sum of its proper divisors (15527991754).

28315749494 is a wasteful number, since it uses less digits than its factorization.

28315749494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456705670.

The product of its digits is 8709120, while the sum is 56.

The spelling of 28315749494 in words is "twenty-eight billion, three hundred fifteen million, seven hundred forty-nine thousand, four hundred ninety-four".