438675820 has 72 divisors (see below), whose sum is σ = 1072243872. Its totient is φ = 150120960.

The previous prime is 438675793. The next prime is 438675883. The reversal of 438675820 is 28576834.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35809 + ... + 46471.

It is an arithmetic number, because the mean of its divisors is an integer number (14892276).

Almost surely, 2^438675820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438675820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (536121936).

438675820 is an abundant number, since it is smaller than the sum of its proper divisors (633568052).

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

438675820 is a wasteful number, since it uses less digits than its factorization.

438675820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10711 (or 10698 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 438675820 is about 20944.5892774244. The cubic root of 438675820 is about 759.8267264261.

The spelling of 438675820 in words is "four hundred thirty-eight million, six hundred seventy-five thousand, eight hundred twenty".