404444340 has 72 divisors (see below), whose sum is σ = 1272267360. Its totient is φ = 107850528.

The previous prime is 404444323. The next prime is 404444357. The reversal of 404444340 is 43444404.

It is an interprime number because it is at equal distance from previous prime (404444323) and next prime (404444357).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 36750 + ... + 46469.

It is an arithmetic number, because the mean of its divisors is an integer number (17670380).

Almost surely, 2^404444340 is an apocalyptic number.

It is an amenable number.

404444340 is an abundant number, since it is smaller than the sum of its proper divisors (867823020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404444340 is a wasteful number, since it uses less digits than its factorization.

404444340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83243 (or 83229 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

The square root of 404444340 is about 20110.8015752729. The cubic root of 404444340 is about 739.5251031392.

Adding to 404444340 its reverse (43444404), we get a palindrome (447888744).

It can be divided in two parts, 4044 and 44340, that added together give a palindrome (48384).

The spelling of 404444340 in words is "four hundred four million, four hundred forty-four thousand, three hundred forty".