84634420 has 24 divisors (see below), whose sum is σ = 191404584. Its totient is φ = 31249536.

The previous prime is 84634409. The next prime is 84634463. The reversal of 84634420 is 2443648.

It can be written as a sum of positive squares in 4 ways, for example, as 1240996 + 83393424 = 1114^2 + 9132^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162499 + ... + 163018.

It is an arithmetic number, because the mean of its divisors is an integer number (7975191).

Almost surely, 2^84634420 is an apocalyptic number.

It is an amenable number.

84634420 is an abundant number, since it is smaller than the sum of its proper divisors (106770164).

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

84634420 is a wasteful number, since it uses less digits than its factorization.

84634420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325539 (or 325537 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 84634420 is about 9199.6967341321. The cubic root of 84634420 is about 439.0517111578.

The spelling of 84634420 in words is "eighty-four million, six hundred thirty-four thousand, four hundred twenty".