44905721 has 16 divisors (see below), whose sum is σ = 57202560. Its totient is φ = 34318080.

The previous prime is 44905709. The next prime is 44905741. The reversal of 44905721 is 12750944.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 44905721 - 2¹⁰ = 44904697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44905741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7670 + ... + 12191.

It is an arithmetic number, because the mean of its divisors is an integer number (3575160).

Almost surely, 2^44905721 is an apocalyptic number.

It is an amenable number.

44905721 is a deficient number, since it is larger than the sum of its proper divisors (12296839).

44905721 is a wasteful number, since it uses less digits than its factorization.

44905721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19904.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 44905721 is about 6701.1731062554. The cubic root of 44905721 is about 355.4407565186.

The spelling of 44905721 in words is "forty-four million, nine hundred five thousand, seven hundred twenty-one".