631986026 has 48 divisors (see below), whose sum is σ = 1143954432. Its totient is φ = 260820000.

The previous prime is 631985983. The next prime is 631986029. The reversal of 631986026 is 620689136.

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 in 23 ways as a sum of consecutive naturals, for example, 841151 + ... + 841901.

It is an arithmetic number, because the mean of its divisors is an integer number (23832384).

Almost surely, 2^631986026 is an apocalyptic number.

631986026 is a deficient number, since it is larger than the sum of its proper divisors (511968406).

631986026 is a wasteful number, since it uses less digits than its factorization.

631986026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075 (or 1068 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 631986026 is about 25139.3322504795. The cubic root of 631986026 is about 858.1617604426.

The spelling of 631986026 in words is "six hundred thirty-one million, nine hundred eighty-six thousand, twenty-six".