631601380 has 24 divisors (see below), whose sum is σ = 1328717880. Its totient is φ = 252192000.

The previous prime is 631601293. The next prime is 631601389. The reversal of 631601380 is 83106136.

631601380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 59721984 + 571879396 = 7728^2 + 23914^2 .

It is not an unprimeable number, because it can be changed into a prime (631601389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16371 + ... + 39130.

It is an arithmetic number, because the mean of its divisors is an integer number (55363245).

Almost surely, 2^631601380 is an apocalyptic number.

It is an amenable number.

631601380 is an abundant number, since it is smaller than the sum of its proper divisors (697116500).

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

631601380 is a wasteful number, since it uses less digits than its factorization.

631601380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56079 (or 56077 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 631601380 is about 25131.6808033207. The cubic root of 631601380 is about 857.9876239560.

The spelling of 631601380 in words is "six hundred thirty-one million, six hundred one thousand, three hundred eighty".