44068781 has 4 divisors (see below), whose sum is σ = 44726592. Its totient is φ = 43410972.

The previous prime is 44068769. The next prime is 44068789. The reversal of 44068781 is 18786044.

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 a de Polignac number, because none of the positive numbers 2^k-44068781 is a prime.

It is a super-2 number, since 2×44068781² = 3884114917651922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44068789) 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, 328805 + ... + 328938.

It is an arithmetic number, because the mean of its divisors is an integer number (11181648).

Almost surely, 2^44068781 is an apocalyptic number.

It is an amenable number.

44068781 is a deficient number, since it is larger than the sum of its proper divisors (657811).

44068781 is an equidigital number, since it uses as much as digits as its factorization.

44068781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657810.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 44068781 is about 6638.4321191076. The cubic root of 44068781 is about 353.2186929814.

The spelling of 44068781 in words is "forty-four million, sixty-eight thousand, seven hundred eighty-one".