400312424 has 32 divisors (see below), whose sum is σ = 808496640. Its totient is φ = 185275200.

The previous prime is 400312421. The next prime is 400312427. The reversal of 400312424 is 424213004.

It is an interprime number because it is at equal distance from previous prime (400312421) and next prime (400312427).

It is a junction number, because it is equal to n+sod(n) for n = 400312396 and 400312405.

It is not an unprimeable number, because it can be changed into a prime (400312421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29387 + ... + 40794.

It is an arithmetic number, because the mean of its divisors is an integer number (25265520).

Almost surely, 2^400312424 is an apocalyptic number.

It is an amenable number.

400312424 is an abundant number, since it is smaller than the sum of its proper divisors (408184216).

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

400312424 is a wasteful number, since it uses less digits than its factorization.

400312424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70241 (or 70237 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 400312424 is about 20007.8090754585. The cubic root of 400312424 is about 736.9980797823.

Adding to 400312424 its reverse (424213004), we get a palindrome (824525428).

The spelling of 400312424 in words is "four hundred million, three hundred twelve thousand, four hundred twenty-four".