85728993 has 8 divisors (see below), whose sum is σ = 130634688. Its totient is φ = 48987984.

The previous prime is 85728989. The next prime is 85729051. The reversal of 85728993 is 39982758.

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

It is not a de Polignac number, because 85728993 - 2² = 85728989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85728913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2041146 + ... + 2041187.

It is an arithmetic number, because the mean of its divisors is an integer number (16329336).

Almost surely, 2^85728993 is an apocalyptic number.

It is an amenable number.

85728993 is a deficient number, since it is larger than the sum of its proper divisors (44905695).

85728993 is a wasteful number, since it uses less digits than its factorization.

85728993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4082343.

The product of its digits is 1088640, while the sum is 51.

The square root of 85728993 is about 9258.9952478657. The cubic root of 85728993 is about 440.9363547787.

The spelling of 85728993 in words is "eighty-five million, seven hundred twenty-eight thousand, nine hundred ninety-three".