28438155272158 has 8 divisors (see below), whose sum is σ = 42657408741528. Its totient is φ = 14219019024984.

The previous prime is 28438155272081. The next prime is 28438155272167. The reversal of 28438155272158 is 85127255183482.

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

It is a junction number, because it is equal to n+sod(n) for n = 28438155272096 and 28438155272105.

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, 28696516 + ... + 29670967.

It is an arithmetic number, because the mean of its divisors is an integer number (5332176092691).

Almost surely, 2^{28438155272158} is an apocalyptic number.

28438155272158 is a deficient number, since it is larger than the sum of its proper divisors (14219253469370).

28438155272158 is a wasteful number, since it uses less digits than its factorization.

28438155272158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58611098.

The product of its digits is 43008000, while the sum is 61.

The spelling of 28438155272158 in words is "twenty-eight trillion, four hundred thirty-eight billion, one hundred fifty-five million, two hundred seventy-two thousand, one hundred fifty-eight".