853991424 has 392 divisors, whose sum is σ = 3008311992. Its totient is φ = 238878720.

The previous prime is 853991387. The next prime is 853991431. The reversal of 853991424 is 424199358.

853991424 is a `hidden beast` number, since 8 + 539 + 91 + 4 + 24 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 853991424.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 65691642 + ... + 65691654.

Almost surely, 2^853991424 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 853991424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1504155996).

853991424 is an abundant number, since it is smaller than the sum of its proper divisors (2154320568).

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

853991424 is an equidigital number, since it uses as much as digits as its factorization.

853991424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68 (or 29 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 853991424 is about 29223.1316596973. The cubic root of 853991424 is about 948.7486475320.

The spelling of 853991424 in words is "eight hundred fifty-three million, nine hundred ninety-one thousand, four hundred twenty-four".