400024132 has 6 divisors (see below), whose sum is σ = 700042238. Its totient is φ = 200012064.

The previous prime is 400024123. The next prime is 400024133. The reversal of 400024132 is 231420004.

It can be written as a sum of positive squares in only one way, i.e., 398641156 + 1382976 = 19966^2 + 1176^2 .

It is not an unprimeable number, because it can be changed into a prime (400024133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50003013 + ... + 50003020.

Almost surely, 2^400024132 is an apocalyptic number.

It is an amenable number.

400024132 is a deficient number, since it is larger than the sum of its proper divisors (300018106).

400024132 is a wasteful number, since it uses less digits than its factorization.

400024132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100006037 (or 100006035 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 400024132 is about 20000.6032909010. The cubic root of 400024132 is about 736.8211166048.

Adding to 400024132 its reverse (231420004), we get a palindrome (631444136).

The spelling of 400024132 in words is "four hundred million, twenty-four thousand, one hundred thirty-two".