400624220404 has 48 divisors (see below), whose sum is σ = 747998798400. Its totient is φ = 187091329536.

The previous prime is 400624220341. The next prime is 400624220407. The reversal of 400624220404 is 404022426004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400624220407) 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 15 ways as a sum of consecutive naturals, for example, 25446367 + ... + 25462105.

It is an arithmetic number, because the mean of its divisors is an integer number (15583308300).

Almost surely, 2^400624220404 is an apocalyptic number.

It is an amenable number.

400624220404 is a deficient number, since it is larger than the sum of its proper divisors (347374577996).

400624220404 is a wasteful number, since it uses less digits than its factorization.

400624220404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18592 (or 18590 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 400624220404 its reverse (404022426004), we get a palindrome (804646646408).

The spelling of 400624220404 in words is "four hundred billion, six hundred twenty-four million, two hundred twenty thousand, four hundred four".