87842844 has 18 divisors (see below), whose sum is σ = 222047280. Its totient is φ = 29280936.

The previous prime is 87842837. The next prime is 87842861. The reversal of 87842844 is 44824878.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 87842844.

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 5 ways as a sum of consecutive naturals, for example, 1220004 + ... + 1220075.

It is an arithmetic number, because the mean of its divisors is an integer number (12335960).

Almost surely, 2^87842844 is an apocalyptic number.

It is an amenable number.

87842844 is an abundant number, since it is smaller than the sum of its proper divisors (134204436).

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

87842844 is a wasteful number, since it uses less digits than its factorization.

87842844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2440089 (or 2440084 counting only the distinct ones).

The product of its digits is 458752, while the sum is 45.

The square root of 87842844 is about 9372.4513335626. The cubic root of 87842844 is about 444.5310786579.

It can be divided in two parts, 8784 and 2844, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 87842844 in words is "eighty-seven million, eight hundred forty-two thousand, eight hundred forty-four".