400032324 has 24 divisors (see below), whose sum is σ = 1037121120. Its totient is φ = 133344072.

The previous prime is 400032323. The next prime is 400032329. The reversal of 400032324 is 423230004.

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 = 400032297 and 400032306.

It is not an unprimeable number, because it can be changed into a prime (400032323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1851894 + ... + 1852109.

It is an arithmetic number, because the mean of its divisors is an integer number (43213380).

Almost surely, 2^400032324 is an apocalyptic number.

It is an amenable number.

400032324 is an abundant number, since it is smaller than the sum of its proper divisors (637088796).

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

400032324 is a wasteful number, since it uses less digits than its factorization.

400032324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3704016 (or 3704008 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 400032324 is about 20000.8080836750. The cubic root of 400032324 is about 736.8261462992.

Adding to 400032324 its reverse (423230004), we get a palindrome (823262328).

The spelling of 400032324 in words is "four hundred million, thirty-two thousand, three hundred twenty-four".