85640375 has 8 divisors (see below), whose sum is σ = 106879344. Its totient is φ = 68512200.

The previous prime is 85640371. The next prime is 85640419. The reversal of 85640375 is 57304658.

It is not a de Polignac number, because 85640375 - 2² = 85640371 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85640371) 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, 342437 + ... + 342686.

It is an arithmetic number, because the mean of its divisors is an integer number (13359918).

Almost surely, 2^85640375 is an apocalyptic number.

85640375 is a deficient number, since it is larger than the sum of its proper divisors (21238969).

85640375 is an equidigital number, since it uses as much as digits as its factorization.

85640375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685138 (or 685128 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 85640375 is about 9254.2085020816. The cubic root of 85640375 is about 440.7843705310.

The spelling of 85640375 in words is "eighty-five million, six hundred forty thousand, three hundred seventy-five".