400432443 has 8 divisors (see below), whose sum is σ = 534133248. Its totient is φ = 266843304.

The previous prime is 400432423. The next prime is 400432447. The reversal of 400432443 is 344234004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400432443 - 2¹⁰ = 400431419 is a prime.

It is a super-2 number, since 2×400432443² = 320692282813896498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400432447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19155 + ... + 34172.

It is an arithmetic number, because the mean of its divisors is an integer number (66766656).

Almost surely, 2^400432443 is an apocalyptic number.

400432443 is a deficient number, since it is larger than the sum of its proper divisors (133700805).

400432443 is a wasteful number, since it uses less digits than its factorization.

400432443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55833.

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 400432443 is about 20010.8081545949. The cubic root of 400432443 is about 737.0717263717.

Adding to 400432443 its reverse (344234004), we get a palindrome (744666447).

It can be divided in two parts, 40043 and 2443, that added together give a triangular number (42486 = T₂₉₁).

The spelling of 400432443 in words is "four hundred million, four hundred thirty-two thousand, four hundred forty-three".