400443452 has 18 divisors (see below), whose sum is σ = 720237672. Its totient is φ = 194807664.

The previous prime is 400443427. The next prime is 400443457. The reversal of 400443452 is 254344004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400443457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31088 + ... + 42039.

It is an arithmetic number, because the mean of its divisors is an integer number (40013204).

Almost surely, 2^400443452 is an apocalyptic number.

It is an amenable number.

400443452 is a deficient number, since it is larger than the sum of its proper divisors (319794220).

400443452 is a wasteful number, since it uses less digits than its factorization.

400443452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73205 (or 73166 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 400443452 is about 20011.0832290508. The cubic root of 400443452 is about 737.0784810261.

Adding to 400443452 its reverse (254344004), we get a palindrome (654787456).

The spelling of 400443452 in words is "four hundred million, four hundred forty-three thousand, four hundred fifty-two".