400313220 has 48 divisors (see below), whose sum is σ = 1121809920. Its totient is φ = 106661376.

The previous prime is 400313203. The next prime is 400313237. The reversal of 400313220 is 22313004.

It is an interprime number because it is at equal distance from previous prime (400313203) and next prime (400313237).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 400313220.

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, 103644 + ... + 107436.

It is an arithmetic number, because the mean of its divisors is an integer number (23371040).

Almost surely, 2^400313220 is an apocalyptic number.

It is an amenable number.

400313220 is an abundant number, since it is smaller than the sum of its proper divisors (721496700).

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

400313220 is a wasteful number, since it uses less digits than its factorization.

400313220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5564 (or 5562 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 400313220 is about 20007.8289676816. The cubic root of 400313220 is about 736.9985682758.

Adding to 400313220 its reverse (22313004), we get a palindrome (422626224).

The spelling of 400313220 in words is "four hundred million, three hundred thirteen thousand, two hundred twenty".