404123544 has 96 divisors (see below), whose sum is σ = 1204154640. Its totient is φ = 122432640.

The previous prime is 404123543. The next prime is 404123557. The reversal of 404123544 is 445321404.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404123543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93724 + ... + 97940.

Almost surely, 2^404123544 is an apocalyptic number.

404123544 is a gapful number since it is divisible by the number (44) 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 404123544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (602077320).

404123544 is an abundant number, since it is smaller than the sum of its proper divisors (800031096).

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

404123544 is a wasteful number, since it uses less digits than its factorization.

404123544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262 (or 4233 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 404123544 is about 20102.8242791902. The cubic root of 404123544 is about 739.3295266220.

Adding to 404123544 its reverse (445321404), we get a palindrome (849444948).

It can be divided in two parts, 40412 and 3544, that added together give a triangular number (43956 = T₂₉₆).

The spelling of 404123544 in words is "four hundred four million, one hundred twenty-three thousand, five hundred forty-four".