44445442 has 4 divisors (see below), whose sum is σ = 66668166. Its totient is φ = 22222720.

The previous prime is 44445437. The next prime is 44445451. The reversal of 44445442 is 24454444.

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., 36711481 + 7733961 = 6059^2 + 2781^2 .

It is an unprimeable number.

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, 11111359 + ... + 11111362.

Almost surely, 2^44445442 is an apocalyptic number.

44445442 is a deficient number, since it is larger than the sum of its proper divisors (22222724).

44445442 is a wasteful number, since it uses less digits than its factorization.

44445442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22222723.

The product of its digits is 40960, while the sum is 31.

The square root of 44445442 is about 6666.7414829135. The cubic root of 44445442 is about 354.2221731934. Note that the first 3 decimals are identical.

Adding to 44445442 its reverse (24454444), we get a palindrome (68899886).

The spelling of 44445442 in words is "forty-four million, four hundred forty-five thousand, four hundred forty-two".