28315823438 has 8 divisors (see below), whose sum is σ = 48541411632. Its totient is φ = 12135352896.

The previous prime is 28315823383. The next prime is 28315823453. The reversal of 28315823438 is 83432851382.

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

It is a super-3 number, since 3×28315823438³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28315823392 and 28315823401.

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, 1011279395 + ... + 1011279422.

It is an arithmetic number, because the mean of its divisors is an integer number (6067676454).

Almost surely, 2^28315823438 is an apocalyptic number.

28315823438 is a deficient number, since it is larger than the sum of its proper divisors (20225588194).

28315823438 is a wasteful number, since it uses less digits than its factorization.

28315823438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022558826.

The product of its digits is 1105920, while the sum is 47.

The spelling of 28315823438 in words is "twenty-eight billion, three hundred fifteen million, eight hundred twenty-three thousand, four hundred thirty-eight".