438331947 has 4 divisors (see below), whose sum is σ = 584442600. Its totient is φ = 292221296.

The previous prime is 438331937. The next prime is 438331951. The reversal of 438331947 is 749133834.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 438331947 - 2¹⁰ = 438330923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 438331899 and 438331908.

It is not an unprimeable number, because it can be changed into a prime (438331937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73055322 + ... + 73055327.

It is an arithmetic number, because the mean of its divisors is an integer number (146110650).

Almost surely, 2^438331947 is an apocalyptic number.

438331947 is a deficient number, since it is larger than the sum of its proper divisors (146110653).

438331947 is a wasteful number, since it uses less digits than its factorization.

438331947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146110652.

The product of its digits is 217728, while the sum is 42.

The square root of 438331947 is about 20936.3785550415. The cubic root of 438331947 is about 759.6281346747.

The spelling of 438331947 in words is "four hundred thirty-eight million, three hundred thirty-one thousand, nine hundred forty-seven".