85158780 has 96 divisors (see below), whose sum is σ = 288562176. Its totient is φ = 18318336.

The previous prime is 85158743. The next prime is 85158781. The reversal of 85158780 is 8785158.

It is a super-2 number, since 2×85158780² = 14504035622176800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85158781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1177 + ... + 13103.

It is an arithmetic number, because the mean of its divisors is an integer number (3005856).

Almost surely, 2^85158780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85158780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144281088).

85158780 is an abundant number, since it is smaller than the sum of its proper divisors (203403396).

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

85158780 is a wasteful number, since it uses less digits than its factorization.

85158780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11963 (or 11961 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 42.

The square root of 85158780 is about 9228.1514942051. The cubic root of 85158780 is about 439.9565728490.

The spelling of 85158780 in words is "eighty-five million, one hundred fifty-eight thousand, seven hundred eighty".