44345421 has 8 divisors (see below), whose sum is σ = 65696960. Its totient is φ = 29563596.

The previous prime is 44345419. The next prime is 44345423. The reversal of 44345421 is 12454344.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (44345419) and next prime (44345423).

It is not a de Polignac number, because 44345421 - 2¹ = 44345419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1642423 = 44345421 / (4 + 4 + 3 + 4 + 5 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44345423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821185 + ... + 821238.

It is an arithmetic number, because the mean of its divisors is an integer number (8212120).

Almost surely, 2^44345421 is an apocalyptic number.

It is an amenable number.

44345421 is a deficient number, since it is larger than the sum of its proper divisors (21351539).

44345421 is a wasteful number, since it uses less digits than its factorization.

44345421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642432 (or 1642426 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 44345421 is about 6659.2357669631. The cubic root of 44345421 is about 353.9562571633.

Adding to 44345421 its reverse (12454344), we get a palindrome (56799765).

The spelling of 44345421 in words is "forty-four million, three hundred forty-five thousand, four hundred twenty-one".