84634638 has 16 divisors (see below), whose sum is σ = 184657536. Its totient is φ = 25646840.

The previous prime is 84634637. The next prime is 84634643. The reversal of 84634638 is 83643648.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 84634638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84634631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641106 + ... + 641237.

It is an arithmetic number, because the mean of its divisors is an integer number (11541096).

Almost surely, 2^84634638 is an apocalyptic number.

84634638 is an abundant number, since it is smaller than the sum of its proper divisors (100022898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84634638 is a wasteful number, since it uses less digits than its factorization.

84634638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282359.

The product of its digits is 331776, while the sum is 42.

The square root of 84634638 is about 9199.7085823411. The cubic root of 84634638 is about 439.0520881250.

The spelling of 84634638 in words is "eighty-four million, six hundred thirty-four thousand, six hundred thirty-eight".