631042328 has 16 divisors (see below), whose sum is σ = 1352233680. Its totient is φ = 270446688.

The previous prime is 631042297. The next prime is 631042331. The reversal of 631042328 is 823240136.

It is a self number, because there is not a number n which added to its sum of digits gives 631042328.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5634251 + ... + 5634362.

It is an arithmetic number, because the mean of its divisors is an integer number (84514605).

Almost surely, 2^631042328 is an apocalyptic number.

It is an amenable number.

631042328 is an abundant number, since it is smaller than the sum of its proper divisors (721191352).

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

631042328 is a wasteful number, since it uses less digits than its factorization.

631042328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11268626 (or 11268622 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 631042328 is about 25120.5558855691. Note that the first 3 decimals coincide. The cubic root of 631042328 is about 857.7344044924.

The spelling of 631042328 in words is "six hundred thirty-one million, forty-two thousand, three hundred twenty-eight".