400433004 has 48 divisors (see below), whose sum is σ = 1053673600. Its totient is φ = 131483088.

The previous prime is 400432987. The next prime is 400433023. The reversal of 400433004 is 400334004.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 20434 + ... + 34905.

Almost surely, 2^400433004 is an apocalyptic number.

It is an amenable number.

400433004 is an abundant number, since it is smaller than the sum of its proper divisors (653240596).

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

400433004 is a wasteful number, since it uses less digits than its factorization.

400433004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55419 (or 55411 counting only the distinct ones).

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

The square root of 400433004 is about 20010.8221720148. The cubic root of 400433004 is about 737.0720705804.

Adding to 400433004 its reverse (400334004), we get a palindrome (800767008).

The spelling of 400433004 in words is "four hundred million, four hundred thirty-three thousand, four".