85401439 has 8 divisors (see below), whose sum is σ = 88769520. Its totient is φ = 82089216.

The previous prime is 85401431. The next prime is 85401443. The reversal of 85401439 is 93410458.

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 85401439 - 2³ = 85401431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85401431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10834 + ... + 16975.

It is an arithmetic number, because the mean of its divisors is an integer number (11096190).

Almost surely, 2^85401439 is an apocalyptic number.

85401439 is a deficient number, since it is larger than the sum of its proper divisors (3368081).

85401439 is a wasteful number, since it uses less digits than its factorization.

85401439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27929.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 85401439 is about 9241.2898991429. The cubic root of 85401439 is about 440.3740603508.

The spelling of 85401439 in words is "eighty-five million, four hundred one thousand, four hundred thirty-nine".