34440021 has 24 divisors (see below), whose sum is σ = 62023104. Its totient is φ = 17890560.

The previous prime is 34440001. The next prime is 34440059. The reversal of 34440021 is 12004443.

It is not a de Polignac number, because 34440021 - 2⁶ = 34439957 is a prime.

It is a super-2 number, since 2×34440021² = 2372230092960882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 34439976 and 34440003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34440001) 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 23 ways as a sum of consecutive naturals, for example, 24156 + ... + 25541.

It is an arithmetic number, because the mean of its divisors is an integer number (2584296).

Almost surely, 2^34440021 is an apocalyptic number.

It is an amenable number.

34440021 is a deficient number, since it is larger than the sum of its proper divisors (27583083).

34440021 is a wasteful number, since it uses less digits than its factorization.

34440021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49721 (or 49718 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 34440021 is about 5868.5620896434. The cubic root of 34440021 is about 325.3527404841.

Adding to 34440021 its reverse (12004443), we get a palindrome (46444464).

The spelling of 34440021 in words is "thirty-four million, four hundred forty thousand, twenty-one".