400304132 has 12 divisors (see below), whose sum is σ = 701998080. Its totient is φ = 199733256.

The previous prime is 400304131. The next prime is 400304161. The reversal of 400304132 is 231403004.

It is a self number, because there is not a number n which added to its sum of digits gives 400304132.

It is not an unprimeable number, because it can be changed into a prime (400304131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102548 + ... + 106379.

It is an arithmetic number, because the mean of its divisors is an integer number (58499840).

Almost surely, 2^400304132 is an apocalyptic number.

It is an amenable number.

400304132 is a deficient number, since it is larger than the sum of its proper divisors (301693948).

400304132 is a wasteful number, since it uses less digits than its factorization.

400304132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209410 (or 209408 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 400304132 is about 20007.6018552949. The cubic root of 400304132 is about 736.9929910650.

Adding to 400304132 its reverse (231403004), we get a palindrome (631707136).

The spelling of 400304132 in words is "four hundred million, three hundred four thousand, one hundred thirty-two".