44391081 has 32 divisors (see below), whose sum is σ = 71608320. Its totient is φ = 23912064.

The previous prime is 44391079. The next prime is 44391089. The reversal of 44391081 is 18019344.

It is a happy number.

44391081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 44391081 - 2¹ = 44391079 is a prime.

It is a super-2 number, since 2×44391081² = 3941136144697122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (44391089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34630 + ... + 35888.

It is an arithmetic number, because the mean of its divisors is an integer number (2237760).

Almost surely, 2^44391081 is an apocalyptic number.

It is an amenable number.

44391081 is a deficient number, since it is larger than the sum of its proper divisors (27217239).

44391081 is a wasteful number, since it uses less digits than its factorization.

44391081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 44391081 is about 6662.6632062562. The cubic root of 44391081 is about 354.0776984801.

The spelling of 44391081 in words is "forty-four million, three hundred ninety-one thousand, eighty-one".