85988990 has 8 divisors (see below), whose sum is σ = 154780200. Its totient is φ = 34395592.

The previous prime is 85988989. The next prime is 85988993. The reversal of 85988990 is 9988958.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85988993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4299440 + ... + 4299459.

It is an arithmetic number, because the mean of its divisors is an integer number (19347525).

Almost surely, 2^85988990 is an apocalyptic number.

85988990 is a deficient number, since it is larger than the sum of its proper divisors (68791210).

85988990 is a wasteful number, since it uses less digits than its factorization.

85988990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8598906.

The product of its (nonzero) digits is 1866240, while the sum is 56.

The square root of 85988990 is about 9273.0248570787. The cubic root of 85988990 is about 441.3816589308.

The spelling of 85988990 in words is "eighty-five million, nine hundred eighty-eight thousand, nine hundred ninety".