438215064 has 64 divisors (see below), whose sum is σ = 1281181440. Its totient is φ = 122290560.

The previous prime is 438215047. The next prime is 438215081. The reversal of 438215064 is 460512834.

It is an interprime number because it is at equal distance from previous prime (438215047) and next prime (438215081).

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 15 ways as a sum of consecutive naturals, for example, 23107 + ... + 37554.

It is an arithmetic number, because the mean of its divisors is an integer number (20018460).

Almost surely, 2^438215064 is an apocalyptic number.

It is an amenable number.

438215064 is an abundant number, since it is smaller than the sum of its proper divisors (842966376).

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

438215064 is a wasteful number, since it uses less digits than its factorization.

438215064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60720 (or 60716 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 438215064 is about 20933.5869836013. The cubic root of 438215064 is about 759.5606093598.

Adding to 438215064 its reverse (460512834), we get a palindrome (898727898).

The spelling of 438215064 in words is "four hundred thirty-eight million, two hundred fifteen thousand, sixty-four".