400112320 has 28 divisors (see below), whose sum is σ = 952768224. Its totient is φ = 160044800.

The previous prime is 400112309. The next prime is 400112329. The reversal of 400112320 is 23211004.

It is a self number, because there is not a number n which added to its sum of digits gives 400112320.

It is not an unprimeable number, because it can be changed into a prime (400112329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624856 + ... + 625495.

Almost surely, 2^400112320 is an apocalyptic number.

400112320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400112320 is an abundant number, since it is smaller than the sum of its proper divisors (552655904).

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

400112320 is a wasteful number, since it uses less digits than its factorization.

400112320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250368 (or 1250358 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 400112320 is about 20002.8078029061. The cubic root of 400112320 is about 736.8752583436.

Adding to 400112320 its reverse (23211004), we get a palindrome (423323324).

The spelling of 400112320 in words is "four hundred million, one hundred twelve thousand, three hundred twenty".