404040403640 has 32 divisors (see below), whose sum is σ = 912052144080. Its totient is φ = 161089719552.

The previous prime is 404040403621. The next prime is 404040403643. The reversal of 404040403640 is 46304040404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404040403643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16438877 + ... + 16463436.

Almost surely, 2^404040403640 is an apocalyptic number.

404040403640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404040403640 is an abundant number, since it is smaller than the sum of its proper divisors (508011740440).

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

404040403640 is a wasteful number, since it uses less digits than its factorization.

404040403640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32902631 (or 32902627 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

The spelling of 404040403640 in words is "four hundred four billion, forty million, four hundred three thousand, six hundred forty".