438686500 has 48 divisors (see below), whose sum is σ = 1094970240. Its totient is φ = 150405600.

The previous prime is 438686401. The next prime is 438686519. The reversal of 438686500 is 5686834.

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, 59170 + ... + 66169.

It is an arithmetic number, because the mean of its divisors is an integer number (22811880).

Almost surely, 2^438686500 is an apocalyptic number.

It is an amenable number.

438686500 is an abundant number, since it is smaller than the sum of its proper divisors (656283740).

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

438686500 is a wasteful number, since it uses less digits than its factorization.

438686500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125365 (or 125353 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 438686500 is about 20944.8442343217. The cubic root of 438686500 is about 759.8328926223.

The spelling of 438686500 in words is "four hundred thirty-eight million, six hundred eighty-six thousand, five hundred".