404840140 has 48 divisors (see below), whose sum is σ = 870912000. Its totient is φ = 158005952.

The previous prime is 404840119. The next prime is 404840143. The reversal of 404840140 is 41048404.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (404840143) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 562701 + ... + 563419.

It is an arithmetic number, because the mean of its divisors is an integer number (18144000).

Almost surely, 2^404840140 is an apocalyptic number.

It is an amenable number.

404840140 is an abundant number, since it is smaller than the sum of its proper divisors (466071860).

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

404840140 is a wasteful number, since it uses less digits than its factorization.

404840140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374 (or 1372 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 404840140 is about 20120.6396518600. The cubic root of 404840140 is about 739.7662641397.

Adding to 404840140 its reverse (41048404), we get a palindrome (445888544).

The spelling of 404840140 in words is "four hundred four million, eight hundred forty thousand, one hundred forty".