85730915 has 16 divisors (see below), whose sum is σ = 109216512. Its totient is φ = 64379904.

The previous prime is 85730893. The next prime is 85730951. The reversal of 85730915 is 51903758.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85730915 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37742 + ... + 39948.

It is an arithmetic number, because the mean of its divisors is an integer number (6826032).

Almost surely, 2^85730915 is an apocalyptic number.

85730915 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

85730915 is a deficient number, since it is larger than the sum of its proper divisors (23485597).

85730915 is a wasteful number, since it uses less digits than its factorization.

85730915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2686.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 85730915 is about 9259.0990382434. The cubic root of 85730915 is about 440.9396499430.

The spelling of 85730915 in words is "eighty-five million, seven hundred thirty thousand, nine hundred fifteen".