404002420440 has 64 divisors (see below), whose sum is σ = 1213674658560. Its totient is φ = 107585765760.

The previous prime is 404002420427. The next prime is 404002420447. The reversal of 404002420440 is 44024200404.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 404002420440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404002420447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2228226 + ... + 2402705.

It is an arithmetic number, because the mean of its divisors is an integer number (18963666540).

Almost surely, 2^404002420440 is an apocalyptic number.

404002420440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404002420440 is an abundant number, since it is smaller than the sum of its proper divisors (809672238120).

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

404002420440 is a wasteful number, since it uses less digits than its factorization.

404002420440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4631672 (or 4631668 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 404002420440 its reverse (44024200404), we get a palindrome (448026620844).

The spelling of 404002420440 in words is "four hundred four billion, two million, four hundred twenty thousand, four hundred forty".