85640275 has 24 divisors (see below), whose sum is σ = 121951520. Its totient is φ = 58440960.

The previous prime is 85640257. The next prime is 85640281. The reversal of 85640275 is 57204658.

It is a happy number.

It is not a de Polignac number, because 85640275 - 2¹¹ = 85638227 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39007 + ... + 41143.

Almost surely, 2^85640275 is an apocalyptic number.

85640275 is a deficient number, since it is larger than the sum of its proper divisors (36311245).

85640275 is a wasteful number, since it uses less digits than its factorization.

85640275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383 (or 2378 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 85640275 is about 9254.2030991328. The cubic root of 85640275 is about 440.7841989669.

The spelling of 85640275 in words is "eighty-five million, six hundred forty thousand, two hundred seventy-five".