85181340 has 24 divisors (see below), whose sum is σ = 238507920. Its totient is φ = 22715008.

The previous prime is 85181329. The next prime is 85181347. The reversal of 85181340 is 4318158.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 85181298 and 85181307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85181347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 709785 + ... + 709904.

It is an arithmetic number, because the mean of its divisors is an integer number (9937830).

Almost surely, 2^85181340 is an apocalyptic number.

It is an amenable number.

85181340 is an abundant number, since it is smaller than the sum of its proper divisors (153326580).

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

85181340 is a wasteful number, since it uses less digits than its factorization.

85181340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419701 (or 1419699 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 85181340 is about 9229.3737599038. The cubic root of 85181340 is about 439.9954200625.

Adding to 85181340 its reverse (4318158), we get a palindrome (89499498).

The spelling of 85181340 in words is "eighty-five million, one hundred eighty-one thousand, three hundred forty".