84644642 has 8 divisors (see below), whose sum is σ = 127069776. Its totient is φ = 42288052.

The previous prime is 84644621. The next prime is 84644647. The reversal of 84644642 is 24644648.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 84644596 and 84644605.

It is not an unprimeable number, because it can be changed into a prime (84644647) by changing a digit.

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, 13928 + ... + 19059.

It is an arithmetic number, because the mean of its divisors is an integer number (15883722).

Almost surely, 2^84644642 is an apocalyptic number.

84644642 is a deficient number, since it is larger than the sum of its proper divisors (42425134).

84644642 is a wasteful number, since it uses less digits than its factorization.

84644642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34272.

The product of its digits is 147456, while the sum is 38.

The square root of 84644642 is about 9200.2522791497. The cubic root of 84644642 is about 439.0693864170.

The spelling of 84644642 in words is "eighty-four million, six hundred forty-four thousand, six hundred forty-two".