84857424 has 20 divisors (see below), whose sum is σ = 219215136. Its totient is φ = 28285792.

The previous prime is 84857411. The next prime is 84857441. The reversal of 84857424 is 42475848.

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 3 ways as a sum of consecutive naturals, for example, 883884 + ... + 883979.

Almost surely, 2^84857424 is an apocalyptic number.

It is an amenable number.

84857424 is an abundant number, since it is smaller than the sum of its proper divisors (134357712).

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

84857424 is a wasteful number, since it uses less digits than its factorization.

84857424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767874 (or 1767868 counting only the distinct ones).

The product of its digits is 286720, while the sum is 42.

The square root of 84857424 is about 9211.8089428733. The cubic root of 84857424 is about 439.4369934049.

The spelling of 84857424 in words is "eighty-four million, eight hundred fifty-seven thousand, four hundred twenty-four".