44638649 has 4 divisors (see below), whose sum is σ = 48696720. Its totient is φ = 40580580.

The previous prime is 44638639. The next prime is 44638663. The reversal of 44638649 is 94683644.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 44638649 - 2⁸ = 44638393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44638639) 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, 2029019 + ... + 2029040.

It is an arithmetic number, because the mean of its divisors is an integer number (12174180).

Almost surely, 2^44638649 is an apocalyptic number.

It is an amenable number.

44638649 is a deficient number, since it is larger than the sum of its proper divisors (4058071).

44638649 is a wasteful number, since it uses less digits than its factorization.

44638649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4058070.

The product of its digits is 497664, while the sum is 44.

The square root of 44638649 is about 6681.2161318131. The cubic root of 44638649 is about 354.7347062439.

The spelling of 44638649 in words is "forty-four million, six hundred thirty-eight thousand, six hundred forty-nine".