4381994 has 4 divisors (see below), whose sum is σ = 6572994. Its totient is φ = 2190996.

The previous prime is 4381973. The next prime is 4381997. The reversal of 4381994 is 4991834.

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

It can be written as a sum of positive squares in only one way, i.e., 4255969 + 126025 = 2063^2 + 355^2 .

It is not an unprimeable number, because it can be changed into a prime (4381997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095497 + ... + 1095500.

Almost surely, 2^4381994 is an apocalyptic number.

4381994 is a deficient number, since it is larger than the sum of its proper divisors (2191000).

4381994 is a wasteful number, since it uses less digits than its factorization.

4381994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190999.

The product of its digits is 31104, while the sum is 38.

The square root of 4381994 is about 2093.3212844664. The cubic root of 4381994 is about 163.6404227762.

The spelling of 4381994 in words is "four million, three hundred eighty-one thousand, nine hundred ninety-four".