631939380 has 48 divisors (see below), whose sum is σ = 1770539904. Its totient is φ = 168411520.

The previous prime is 631939339. The next prime is 631939387. The reversal of 631939380 is 83939136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631939387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159625 + ... + 163535.

It is an arithmetic number, because the mean of its divisors is an integer number (36886248).

Almost surely, 2^631939380 is an apocalyptic number.

631939380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

631939380 is an abundant number, since it is smaller than the sum of its proper divisors (1138600524).

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

631939380 is a wasteful number, since it uses less digits than its factorization.

631939380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6616 (or 6614 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 631939380 is about 25138.4044839763. The cubic root of 631939380 is about 858.1406466855.

The spelling of 631939380 in words is "six hundred thirty-one million, nine hundred thirty-nine thousand, three hundred eighty".