85440740 has 96 divisors (see below), whose sum is σ = 226195200. Its totient is φ = 26334720.

The previous prime is 85440737. The next prime is 85440749. The reversal of 85440740 is 4704458.

It is a junction number, because it is equal to n+sod(n) for n = 85440697 and 85440706.

It is not an unprimeable number, because it can be changed into a prime (85440749) 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, 167606 + ... + 168114.

It is an arithmetic number, because the mean of its divisors is an integer number (2356200).

Almost surely, 2^85440740 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 85440740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113097600).

85440740 is an abundant number, since it is smaller than the sum of its proper divisors (140754460).

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

85440740 is a wasteful number, since it uses less digits than its factorization.

85440740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 85440740 is about 9243.4160352112. The cubic root of 85440740 is about 440.4416020962.

The spelling of 85440740 in words is "eighty-five million, four hundred forty thousand, seven hundred forty".