85724807 has 8 divisors (see below), whose sum is σ = 99152256. Its totient is φ = 72592632.

The previous prime is 85724803. The next prime is 85724813. The reversal of 85724807 is 70842758.

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

It is not a de Polignac number, because 85724807 - 2² = 85724803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85724803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73193 + ... + 74354.

It is an arithmetic number, because the mean of its divisors is an integer number (12394032).

Almost surely, 2^85724807 is an apocalyptic number.

85724807 is a deficient number, since it is larger than the sum of its proper divisors (13427449).

85724807 is a wasteful number, since it uses less digits than its factorization.

85724807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147637.

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 85724807 is about 9258.7691946608. The cubic root of 85724807 is about 440.9291779394.

The spelling of 85724807 in words is "eighty-five million, seven hundred twenty-four thousand, eight hundred seven".