404023004 has 48 divisors (see below), whose sum is σ = 885325056. Its totient is φ = 156729600.

The previous prime is 404022961. The next prime is 404023007. The reversal of 404023004 is 400320404.

It is a super-2 number, since 2×404023004² = 326469175522368032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404023007) 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, 71507 + ... + 76949.

It is an arithmetic number, because the mean of its divisors is an integer number (18444272).

Almost surely, 2^404023004 is an apocalyptic number.

404023004 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 404023004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (442662528).

404023004 is an abundant number, since it is smaller than the sum of its proper divisors (481302052).

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

404023004 is a wasteful number, since it uses less digits than its factorization.

404023004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5706 (or 5704 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 404023004 is about 20100.3234799841. The cubic root of 404023004 is about 739.2682100958.

Adding to 404023004 its reverse (400320404), we get a palindrome (804343408).

The spelling of 404023004 in words is "four hundred four million, twenty-three thousand, four".