44321991 has 16 divisors (see below), whose sum is σ = 67684608. Its totient is φ = 25272000.

The previous prime is 44321983. The next prime is 44321993. The reversal of 44321991 is 19912344.

It is not a de Polignac number, because 44321991 - 2³ = 44321983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44321993) 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, 8916 + ... + 12966.

It is an arithmetic number, because the mean of its divisors is an integer number (4230288).

Almost surely, 2^44321991 is an apocalyptic number.

44321991 is a deficient number, since it is larger than the sum of its proper divisors (23362617).

44321991 is a wasteful number, since it uses less digits than its factorization.

44321991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4582.

The product of its digits is 7776, while the sum is 33.

The square root of 44321991 is about 6657.4763236530. The cubic root of 44321991 is about 353.8939083275.

The spelling of 44321991 in words is "forty-four million, three hundred twenty-one thousand, nine hundred ninety-one".