85891770 has 48 divisors (see below), whose sum is σ = 224426592. Its totient is φ = 22790880.

The previous prime is 85891759. The next prime is 85891781. The reversal of 85891770 is 7719858.

It is an interprime number because it is at equal distance from previous prime (85891759) and next prime (85891781).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16729 + ... + 21251.

It is an arithmetic number, because the mean of its divisors is an integer number (4675554).

Almost surely, 2^85891770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85891770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112213296).

85891770 is an abundant number, since it is smaller than the sum of its proper divisors (138534822).

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

85891770 is a wasteful number, since it uses less digits than its factorization.

85891770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4747 (or 4744 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 85891770 is about 9267.7812878812. The cubic root of 85891770 is about 441.2152527162.

The spelling of 85891770 in words is "eighty-five million, eight hundred ninety-one thousand, seven hundred seventy".