44638721 has 8 divisors (see below), whose sum is σ = 45276000. Its totient is φ = 44005248.

The previous prime is 44638679. The next prime is 44638723. The reversal of 44638721 is 12783644.

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

It is a cyclic number.

It is not a de Polignac number, because 44638721 - 2¹⁴ = 44622337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44638723) 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, 29030 + ... + 30528.

It is an arithmetic number, because the mean of its divisors is an integer number (5659500).

Almost surely, 2^44638721 is an apocalyptic number.

It is an amenable number.

44638721 is a deficient number, since it is larger than the sum of its proper divisors (637279).

44638721 is a wasteful number, since it uses less digits than its factorization.

44638721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903.

The product of its digits is 32256, while the sum is 35.

The square root of 44638721 is about 6681.2215200516. The cubic root of 44638721 is about 354.7348969671.

The spelling of 44638721 in words is "forty-four million, six hundred thirty-eight thousand, seven hundred twenty-one".