40004420 has 12 divisors (see below), whose sum is σ = 84009324. Its totient is φ = 16001760.

The previous prime is 40004413. The next prime is 40004467. The reversal of 40004420 is 2440004.

It can be written as a sum of positive squares in 2 ways, for example, as 25381444 + 14622976 = 5038^2 + 3824^2 .

It is a super-3 number, since 3×40004420³ (a number of 24 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (14) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 40004395 and 40004404.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1000091 + ... + 1000130.

It is an arithmetic number, because the mean of its divisors is an integer number (7000777).

Almost surely, 2^40004420 is an apocalyptic number.

It is an amenable number.

40004420 is an abundant number, since it is smaller than the sum of its proper divisors (44004904).

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

40004420 is a wasteful number, since it uses less digits than its factorization.

40004420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000230 (or 2000228 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 40004420 is about 6324.9047423657. The cubic root of 40004420 is about 342.0077856942.

Adding to 40004420 its reverse (2440004), we get a palindrome (42444424).

The spelling of 40004420 in words is "forty million, four thousand, four hundred twenty".