400404500 has 48 divisors (see below), whose sum is σ = 886878720. Its totient is φ = 157892000.

The previous prime is 400404481. The next prime is 400404523. The reversal of 400404500 is 5404004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29861 + ... + 41139.

It is an arithmetic number, because the mean of its divisors is an integer number (18476640).

Almost surely, 2^400404500 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 400404500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (443439360).

400404500 is an abundant number, since it is smaller than the sum of its proper divisors (486474220).

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

400404500 is a wasteful number, since it uses less digits than its factorization.

400404500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11369 (or 11357 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 400404500 is about 20010.1099447254. The cubic root of 400404500 is about 737.0545811789.

Adding to 400404500 its reverse (5404004), we get a palindrome (405808504).

The spelling of 400404500 in words is "four hundred million, four hundred four thousand, five hundred".