85169380 has 12 divisors (see below), whose sum is σ = 178855740. Its totient is φ = 34067744.

The previous prime is 85169363. The next prime is 85169401. The reversal of 85169380 is 8396158.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 66455104 + 18714276 = 8152^2 + 4326^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2129215 + ... + 2129254.

It is an arithmetic number, because the mean of its divisors is an integer number (14904645).

Almost surely, 2^85169380 is an apocalyptic number.

It is an amenable number.

85169380 is an abundant number, since it is smaller than the sum of its proper divisors (93686360).

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

85169380 is a wasteful number, since it uses less digits than its factorization.

85169380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4258478 (or 4258476 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 85169380 is about 9228.7258058737. The cubic root of 85169380 is about 439.9748263835.

The spelling of 85169380 in words is "eighty-five million, one hundred sixty-nine thousand, three hundred eighty".