4400642 has 4 divisors (see below), whose sum is σ = 6600966. Its totient is φ = 2200320.

The previous prime is 4400639. The next prime is 4400687. The reversal of 4400642 is 2460044.

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., 3236401 + 1164241 = 1799^2 + 1079^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1100159 + ... + 1100162.

Almost surely, 2^4400642 is an apocalyptic number.

4400642 is a deficient number, since it is larger than the sum of its proper divisors (2200324).

4400642 is a wasteful number, since it uses less digits than its factorization.

4400642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2200323.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 4400642 is about 2097.7707215041. The cubic root of 4400642 is about 163.8722234940.

Adding to 4400642 its reverse (2460044), we get a palindrome (6860686).

The spelling of 4400642 in words is "four million, four hundred thousand, six hundred forty-two".