85728394 has 8 divisors (see below), whose sum is σ = 129007008. Its totient is φ = 42726060.

The previous prime is 85728373. The next prime is 85728403. The reversal of 85728394 is 49382758.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68292 + ... + 69535.

It is an arithmetic number, because the mean of its divisors is an integer number (16125876).

Almost surely, 2^85728394 is an apocalyptic number.

85728394 is a deficient number, since it is larger than the sum of its proper divisors (43278614).

85728394 is a wasteful number, since it uses less digits than its factorization.

85728394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138140.

The product of its digits is 483840, while the sum is 46.

The square root of 85728394 is about 9258.9629008869. The cubic root of 85728394 is about 440.9353278158.

The spelling of 85728394 in words is "eighty-five million, seven hundred twenty-eight thousand, three hundred ninety-four".