85840019 has 8 divisors (see below), whose sum is σ = 89595072. Its totient is φ = 82164160.

The previous prime is 85840003. The next prime is 85840061. The reversal of 85840019 is 91004858.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85840019 - 2⁴ = 85840003 is a prime.

It is a super-2 number, since 2×85840019² = 14737017723840722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85840219) 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, 17579 + ... + 21924.

It is an arithmetic number, because the mean of its divisors is an integer number (11199384).

Almost surely, 2^85840019 is an apocalyptic number.

85840019 is a deficient number, since it is larger than the sum of its proper divisors (3755053).

85840019 is a wasteful number, since it uses less digits than its factorization.

85840019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39597.

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

The square root of 85840019 is about 9264.9888828859. The cubic root of 85840019 is about 441.1266221141.

The spelling of 85840019 in words is "eighty-five million, eight hundred forty thousand, nineteen".