44002001 has 4 divisors (see below), whose sum is σ = 46590372. Its totient is φ = 41413632.

The previous prime is 44001977. The next prime is 44002009. The reversal of 44002001 is 10020044.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21864976 + 22137025 = 4676^2 + 4705^2 .

It is a de Polignac number, because none of the positive numbers 2^k-44002001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44002009) 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, 1294160 + ... + 1294193.

It is an arithmetic number, because the mean of its divisors is an integer number (11647593).

Almost surely, 2^44002001 is an apocalyptic number.

It is an amenable number.

44002001 is a deficient number, since it is larger than the sum of its proper divisors (2588371).

44002001 is a wasteful number, since it uses less digits than its factorization.

44002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588370.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 44002001 is about 6633.4004100461. The cubic root of 44002001 is about 353.0401851386.

Adding to 44002001 its reverse (10020044), we get a palindrome (54022045).

The spelling of 44002001 in words is "forty-four million, two thousand, one".