631986028 has 6 divisors (see below), whose sum is σ = 1105975556. Its totient is φ = 315993012.

The previous prime is 631985983. The next prime is 631986029. The reversal of 631986028 is 820689136.

It is not an unprimeable number, because it can be changed into a prime (631986029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78998250 + ... + 78998257.

Almost surely, 2^631986028 is an apocalyptic number.

It is an amenable number.

631986028 is a deficient number, since it is larger than the sum of its proper divisors (473989528).

631986028 is a wasteful number, since it uses less digits than its factorization.

631986028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157996511 (or 157996509 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 631986028 is about 25139.3322902578. The cubic root of 631986028 is about 858.1617613478.

The spelling of 631986028 in words is "six hundred thirty-one million, nine hundred eighty-six thousand, twenty-eight".