404011423440 has 120 divisors (see below), whose sum is σ = 1357397728128. Its totient is φ = 107689317120.

The previous prime is 404011423427. The next prime is 404011423463. The reversal of 404011423440 is 44324110404.

404011423440 is a `hidden beast` number, since 40 + 40 + 1 + 142 + 3 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1542517 + ... + 1785323.

Almost surely, 2^404011423440 is an apocalyptic number.

404011423440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404011423440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (678698864064).

404011423440 is an abundant number, since it is smaller than the sum of its proper divisors (953386304688).

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

404011423440 is a wasteful number, since it uses less digits than its factorization.

404011423440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245137 (or 245128 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 404011423440 its reverse (44324110404), we get a palindrome (448335533844).

The spelling of 404011423440 in words is "four hundred four billion, eleven million, four hundred twenty-three thousand, four hundred forty".