85869615 has 32 divisors (see below), whose sum is σ = 148732416. Its totient is φ = 42053760.

The previous prime is 85869571. The next prime is 85869617. The reversal of 85869615 is 51696858.

It is not a de Polignac number, because 85869615 - 2¹⁴ = 85853231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85869617) 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 31 ways as a sum of consecutive naturals, for example, 40102 + ... + 42188.

It is an arithmetic number, because the mean of its divisors is an integer number (4647888).

Almost surely, 2^85869615 is an apocalyptic number.

85869615 is a deficient number, since it is larger than the sum of its proper divisors (62862801).

85869615 is a wasteful number, since it uses less digits than its factorization.

85869615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319.

The product of its digits is 518400, while the sum is 48.

The square root of 85869615 is about 9266.5859408954. The cubic root of 85869615 is about 441.1773136350.

The spelling of 85869615 in words is "eighty-five million, eight hundred sixty-nine thousand, six hundred fifteen".