4394381 has 8 divisors (see below), whose sum is σ = 4717944. Its totient is φ = 4078080.

The previous prime is 4394371. The next prime is 4394413. The reversal of 4394381 is 1834934.

It can be written as a sum of positive squares in 4 ways, for example, as 1136356 + 3258025 = 1066^2 + 1805^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4394381 is a prime.

It is a super-2 number, since 2×4394381² = 38621168746322, 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 (4394321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 530 + ... + 3011.

It is an arithmetic number, because the mean of its divisors is an integer number (589743).

Almost surely, 2^4394381 is an apocalyptic number.

It is an amenable number.

4394381 is a deficient number, since it is larger than the sum of its proper divisors (323563).

4394381 is a wasteful number, since it uses less digits than its factorization.

4394381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3631.

The product of its digits is 10368, while the sum is 32.

The square root of 4394381 is about 2096.2778918836. The cubic root of 4394381 is about 163.7944703724.

The spelling of 4394381 in words is "four million, three hundred ninety-four thousand, three hundred eighty-one".