85158390 has 32 divisors (see below), whose sum is σ = 204975360. Its totient is φ = 22642784.

The previous prime is 85158371. The next prime is 85158391. The reversal of 85158390 is 9385158.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85158391) 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, 6817 + ... + 14723.

It is an arithmetic number, because the mean of its divisors is an integer number (6405480).

Almost surely, 2^85158390 is an apocalyptic number.

85158390 is an abundant number, since it is smaller than the sum of its proper divisors (119816970).

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

85158390 is a wasteful number, since it uses less digits than its factorization.

85158390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8276.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 85158390 is about 9228.1303631884. The cubic root of 85158390 is about 439.9559012278.

The spelling of 85158390 in words is "eighty-five million, one hundred fifty-eight thousand, three hundred ninety".