84450638 has 4 divisors (see below), whose sum is σ = 126675960. Its totient is φ = 42225318.

The previous prime is 84450637. The next prime is 84450643. The reversal of 84450638 is 83605448.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84450631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21112658 + ... + 21112661.

It is an arithmetic number, because the mean of its divisors is an integer number (31668990).

Almost surely, 2^84450638 is an apocalyptic number.

84450638 is a deficient number, since it is larger than the sum of its proper divisors (42225322).

84450638 is a wasteful number, since it uses less digits than its factorization.

84450638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42225321.

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 84450638 is about 9189.7028243573. The cubic root of 84450638 is about 438.7336834272.

The spelling of 84450638 in words is "eighty-four million, four hundred fifty thousand, six hundred thirty-eight".