400432424 has 32 divisors (see below), whose sum is σ = 862161600. Its totient is φ = 170795520.

The previous prime is 400432423. The next prime is 400432447. The reversal of 400432424 is 424234004.

It is a super-2 number, since 2×400432424² = 320692252381031552, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400432424.

It is not an unprimeable number, because it can be changed into a prime (400432423) 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, 5129 + ... + 28760.

It is an arithmetic number, because the mean of its divisors is an integer number (26942550).

Almost surely, 2^400432424 is an apocalyptic number.

It is an amenable number.

400432424 is an abundant number, since it is smaller than the sum of its proper divisors (461729176).

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

400432424 is a wasteful number, since it uses less digits than its factorization.

400432424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34113 (or 34109 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 400432424 is about 20010.8076798514. The cubic root of 400432424 is about 737.0717147140.

Adding to 400432424 its reverse (424234004), we get a palindrome (824666428).

The spelling of 400432424 in words is "four hundred million, four hundred thirty-two thousand, four hundred twenty-four".