44220491 has 18 divisors (see below), whose sum is σ = 52464852. Its totient is φ = 37160760.

The previous prime is 44220479. The next prime is 44220493. The reversal of 44220491 is 19402244.

It is a de Polignac number, because none of the positive numbers 2^k-44220491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 44220491.

It is not an unprimeable number, because it can be changed into a prime (44220493) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 337496 + ... + 337626.

It is an arithmetic number, because the mean of its divisors is an integer number (2914714).

Almost surely, 2^44220491 is an apocalyptic number.

44220491 is a deficient number, since it is larger than the sum of its proper divisors (8244361).

44220491 is an equidigital number, since it uses as much as digits as its factorization.

44220491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 44220491 is about 6649.8489456528. The cubic root of 44220491 is about 353.6235558031.

The spelling of 44220491 in words is "forty-four million, two hundred twenty thousand, four hundred ninety-one".