28115345 has 8 divisors (see below), whose sum is σ = 35514240. Its totient is φ = 21308400.

The previous prime is 28115323. The next prime is 28115359. The reversal of 28115345 is 54351182.

28115345 = T₂₉₄ + T₂₉₅ + ... + T₅₇₈.

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

It is not a de Polignac number, because 28115345 - 2¹⁰ = 28114321 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147881 + ... + 148070.

It is an arithmetic number, because the mean of its divisors is an integer number (4439280).

Almost surely, 2^28115345 is an apocalyptic number.

It is an amenable number.

28115345 is a deficient number, since it is larger than the sum of its proper divisors (7398895).

28115345 is a wasteful number, since it uses less digits than its factorization.

28115345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295975.

The product of its digits is 4800, while the sum is 29.

The square root of 28115345 is about 5302.3904986336. The cubic root of 28115345 is about 304.0752965898.

The spelling of 28115345 in words is "twenty-eight million, one hundred fifteen thousand, three hundred forty-five".