84181538 has 16 divisors (see below), whose sum is σ = 144431424. Its totient is φ = 36047760.

The previous prime is 84181507. The next prime is 84181553. The reversal of 84181538 is 83518148.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26453 + ... + 29463.

It is an arithmetic number, because the mean of its divisors is an integer number (9026964).

Almost surely, 2^84181538 is an apocalyptic number.

84181538 is a deficient number, since it is larger than the sum of its proper divisors (60249886).

84181538 is a wasteful number, since it uses less digits than its factorization.

84181538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5017.

The product of its digits is 30720, while the sum is 38.

The square root of 84181538 is about 9175.0497546335. The cubic root of 84181538 is about 438.2671826744.

The spelling of 84181538 in words is "eighty-four million, one hundred eighty-one thousand, five hundred thirty-eight".