400503222 has 48 divisors (see below), whose sum is σ = 992852640. Its totient is φ = 114299136.

The previous prime is 400503179. The next prime is 400503227. The reversal of 400503222 is 222305004.

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

It is a junction number, because it is equal to n+sod(n) for n = 400503195 and 400503204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400503227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187054 + ... + 189182.

It is an arithmetic number, because the mean of its divisors is an integer number (20684430).

Almost surely, 2^400503222 is an apocalyptic number.

400503222 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

400503222 is an abundant number, since it is smaller than the sum of its proper divisors (592349418).

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

400503222 is a wasteful number, since it uses less digits than its factorization.

400503222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3637 (or 3634 counting only the distinct ones).

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

The square root of 400503222 is about 20012.5765957310. The cubic root of 400503222 is about 737.1151511967.

Adding to 400503222 its reverse (222305004), we get a palindrome (622808226).

The spelling of 400503222 in words is "four hundred million, five hundred three thousand, two hundred twenty-two".