85715487 has 24 divisors (see below), whose sum is σ = 145458768. Its totient is φ = 47952000.

The previous prime is 85715449. The next prime is 85715489. The reversal of 85715487 is 78451758.

It is a happy number.

It is not a de Polignac number, because 85715487 - 2⁶ = 85715423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85715489) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32014 + ... + 34587.

It is an arithmetic number, because the mean of its divisors is an integer number (6060782).

Almost surely, 2^85715487 is an apocalyptic number.

85715487 is a deficient number, since it is larger than the sum of its proper divisors (59743281).

85715487 is a wasteful number, since it uses less digits than its factorization.

85715487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66631 (or 66628 counting only the distinct ones).

The product of its digits is 313600, while the sum is 45.

The square root of 85715487 is about 9258.2658743417. The cubic root of 85715487 is about 440.9131980886.

The spelling of 85715487 in words is "eighty-five million, seven hundred fifteen thousand, four hundred eighty-seven".