84386642 has 4 divisors (see below), whose sum is σ = 126579966. Its totient is φ = 42193320.

The previous prime is 84386641. The next prime is 84386669. The reversal of 84386642 is 24668348.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 67584841 + 16801801 = 8221^2 + 4099^2 .

It is a super-2 number, since 2×84386642² = 14242210696072328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 84386642.

It is not an unprimeable number, because it can be changed into a prime (84386641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21096659 + ... + 21096662.

Almost surely, 2^84386642 is an apocalyptic number.

84386642 is a deficient number, since it is larger than the sum of its proper divisors (42193324).

84386642 is a wasteful number, since it uses less digits than its factorization.

84386642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42193323.

The product of its digits is 221184, while the sum is 41.

The square root of 84386642 is about 9186.2202237917. The cubic root of 84386642 is about 438.6228324943.

The spelling of 84386642 in words is "eighty-four million, three hundred eighty-six thousand, six hundred forty-two".