438162813 has 12 divisors (see below), whose sum is σ = 690438528. Its totient is φ = 265553160.

The previous prime is 438162793. The next prime is 438162821. The reversal of 438162813 is 318261834.

It is not a de Polignac number, because 438162813 - 2²¹ = 436065661 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438162113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2212845 + ... + 2213042.

It is an arithmetic number, because the mean of its divisors is an integer number (57536544).

Almost surely, 2^438162813 is an apocalyptic number.

It is an amenable number.

438162813 is a deficient number, since it is larger than the sum of its proper divisors (252275715).

438162813 is a wasteful number, since it uses less digits than its factorization.

438162813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4425904 (or 4425901 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 438162813 is about 20932.3389280797. The cubic root of 438162813 is about 759.5304191768.

The spelling of 438162813 in words is "four hundred thirty-eight million, one hundred sixty-two thousand, eight hundred thirteen".