404028000 has 480 divisors, whose sum is σ = 1569728160. Its totient is φ = 101606400.

The previous prime is 404027969. The next prime is 404028013. The reversal of 404028000 is 820404.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9395979 + ... + 9396021.

It is an arithmetic number, because the mean of its divisors is an integer number (3270267).

Almost surely, 2^404028000 is an apocalyptic number.

404028000 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 404028000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (784864080).

404028000 is an abundant number, since it is smaller than the sum of its proper divisors (1165700160).

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

404028000 is a wasteful number, since it uses less digits than its factorization.

404028000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 404028000 is about 20100.4477562068. The cubic root of 404028000 is about 739.2712572562.

Adding to 404028000 its reverse (820404), we get a palindrome (404848404).

The spelling of 404028000 in words is "four hundred four million, twenty-eight thousand".