84138450 has 48 divisors (see below), whose sum is σ = 227637216. Its totient is φ = 20396800.

The previous prime is 84138449. The next prime is 84138497. The reversal of 84138450 is 5483148.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23847 + ... + 27146.

It is an arithmetic number, because the mean of its divisors is an integer number (4742442).

Almost surely, 2^84138450 is an apocalyptic number.

84138450 is an abundant number, since it is smaller than the sum of its proper divisors (143498766).

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

84138450 is a wasteful number, since it uses less digits than its factorization.

84138450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51019 (or 51014 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 84138450 is about 9172.7013469316. The cubic root of 84138450 is about 438.1923947829.

The spelling of 84138450 in words is "eighty-four million, one hundred thirty-eight thousand, four hundred fifty".