438076381 has 4 divisors (see below), whose sum is σ = 438121152. Its totient is φ = 438031612.

The previous prime is 438076363. The next prime is 438076391. The reversal of 438076381 is 183670834.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438076381 is a prime.

It is a super-2 number, since 2×438076381² = 383821831180114322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438076361) 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, 715 + ... + 29608.

It is an arithmetic number, because the mean of its divisors is an integer number (109530288).

Almost surely, 2^438076381 is an apocalyptic number.

It is an amenable number.

438076381 is a deficient number, since it is larger than the sum of its proper divisors (44771).

438076381 is a wasteful number, since it uses less digits than its factorization.

438076381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44770.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 438076381 is about 20930.2742695838. The cubic root of 438076381 is about 759.4804742337.

The spelling of 438076381 in words is "four hundred thirty-eight million, seventy-six thousand, three hundred eighty-one".