631404400 has 60 divisors (see below), whose sum is σ = 1654865064. Its totient is φ = 229600000.

The previous prime is 631404391. The next prime is 631404407. The reversal of 631404400 is 4404136.

It is a happy number.

631404400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631404407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67351 + ... + 76150.

Almost surely, 2^631404400 is an apocalyptic number.

It is an amenable number.

631404400 is an abundant number, since it is smaller than the sum of its proper divisors (1023460664).

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

631404400 is a wasteful number, since it uses less digits than its factorization.

631404400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143530 (or 143519 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 631404400 is about 25127.7615397791. The cubic root of 631404400 is about 857.8984200265.

Adding to 631404400 its reverse (4404136), we get a palindrome (635808536).

The spelling of 631404400 in words is "six hundred thirty-one million, four hundred four thousand, four hundred".