85687998 has 32 divisors (see below), whose sum is σ = 187608960. Its totient is φ = 25875360.

The previous prime is 85687997. The next prime is 85688021. The reversal of 85687998 is 89978658.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85687997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18148 + ... + 22376.

It is an arithmetic number, because the mean of its divisors is an integer number (5862780).

Almost surely, 2^85687998 is an apocalyptic number.

85687998 is an abundant number, since it is smaller than the sum of its proper divisors (101920962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85687998 is a wasteful number, since it uses less digits than its factorization.

85687998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4552.

The product of its digits is 8709120, while the sum is 60.

The square root of 85687998 is about 9256.7811900250. The cubic root of 85687998 is about 440.8660593540.

The spelling of 85687998 in words is "eighty-five million, six hundred eighty-seven thousand, nine hundred ninety-eight".