404400763640 has 32 divisors (see below), whose sum is σ = 915483952080. Its totient is φ = 160767908352.

The previous prime is 404400763633. The next prime is 404400763643. The reversal of 404400763640 is 46367004404.

It is a junction number, because it is equal to n+sod(n) for n = 404400763594 and 404400763603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404400763643) 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, 31005809 + ... + 31018848.

Almost surely, 2^404400763640 is an apocalyptic number.

404400763640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404400763640 is an abundant number, since it is smaller than the sum of its proper divisors (511083188440).

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

404400763640 is a wasteful number, since it uses less digits than its factorization.

404400763640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62024831 (or 62024827 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 38.

The spelling of 404400763640 in words is "four hundred four billion, four hundred million, seven hundred sixty-three thousand, six hundred forty".