84873840 has 40 divisors (see below), whose sum is σ = 263109648. Its totient is φ = 22632960.

The previous prime is 84873839. The next prime is 84873851. The reversal of 84873840 is 4837848.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 84873792 and 84873801.

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 7 ways as a sum of consecutive naturals, for example, 176581 + ... + 177060.

Almost surely, 2^84873840 is an apocalyptic number.

84873840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84873840 is an abundant number, since it is smaller than the sum of its proper divisors (178235808).

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

84873840 is a wasteful number, since it uses less digits than its factorization.

84873840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353657 (or 353651 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 42.

The square root of 84873840 is about 9212.6999299880. The cubic root of 84873840 is about 439.4653285119.

The spelling of 84873840 in words is "eighty-four million, eight hundred seventy-three thousand, eight hundred forty".