85890140 has 36 divisors (see below), whose sum is σ = 209819736. Its totient is φ = 29447712.

The previous prime is 85890131. The next prime is 85890149. The reversal of 85890140 is 4109858.

It is an interprime number because it is at equal distance from previous prime (85890131) and next prime (85890149).

It is a super-2 number, since 2×85890140² = 14754232298439200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 85890140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85890149) 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 11 ways as a sum of consecutive naturals, for example, 42842 + ... + 44801.

It is an arithmetic number, because the mean of its divisors is an integer number (5828326).

Almost surely, 2^85890140 is an apocalyptic number.

It is an amenable number.

85890140 is an abundant number, since it is smaller than the sum of its proper divisors (123929596).

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

85890140 is a wasteful number, since it uses less digits than its factorization.

85890140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87666 (or 87657 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 85890140 is about 9267.6933484012. The cubic root of 85890140 is about 441.2124616633.

Adding to 85890140 its reverse (4109858), we get a palindrome (89999998).

The spelling of 85890140 in words is "eighty-five million, eight hundred ninety thousand, one hundred forty".