400503204 has 240 divisors, whose sum is σ = 1207483200. Its totient is φ = 114960384.

The previous prime is 400503179. The next prime is 400503227. The reversal of 400503204 is 402305004.

It is a happy number.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4499992 + ... + 4500080.

It is an arithmetic number, because the mean of its divisors is an integer number (5031180).

Almost surely, 2^400503204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400503204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (603741600).

400503204 is an abundant number, since it is smaller than the sum of its proper divisors (806979996).

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

400503204 is a wasteful number, since it uses less digits than its factorization.

400503204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 400503204 is about 20012.5761460138. The cubic root of 400503204 is about 737.1151401539.

Adding to 400503204 its reverse (402305004), we get a palindrome (802808208).

The spelling of 400503204 in words is "four hundred million, five hundred three thousand, two hundred four".