84023642 has 4 divisors (see below), whose sum is σ = 126035466. Its totient is φ = 42011820.

The previous prime is 84023629. The next prime is 84023647. The reversal of 84023642 is 24632048.

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., 82609921 + 1413721 = 9089^2 + 1189^2 .

It is not an unprimeable number, because it can be changed into a prime (84023647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21005909 + ... + 21005912.

Almost surely, 2^84023642 is an apocalyptic number.

84023642 is a deficient number, since it is larger than the sum of its proper divisors (42011824).

84023642 is a wasteful number, since it uses less digits than its factorization.

84023642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42011823.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 84023642 is about 9166.4410760120. The cubic root of 84023642 is about 437.9929976710.

The spelling of 84023642 in words is "eighty-four million, twenty-three thousand, six hundred forty-two".