631636948 has 24 divisors (see below), whose sum is σ = 1177972992. Its totient is φ = 295657824.

The previous prime is 631636927. The next prime is 631636961. The reversal of 631636948 is 849636136.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 631636898 and 631636907.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 68715 + ... + 77362.

It is an arithmetic number, because the mean of its divisors is an integer number (49082208).

Almost surely, 2^631636948 is an apocalyptic number.

It is an amenable number.

631636948 is a deficient number, since it is larger than the sum of its proper divisors (546336044).

631636948 is a wasteful number, since it uses less digits than its factorization.

631636948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146151 (or 146149 counting only the distinct ones).

The product of its digits is 559872, while the sum is 46.

The square root of 631636948 is about 25132.3884260927. The cubic root of 631636948 is about 858.0037292253.

It can be divided in two parts, 6316 and 36948, that added together give a square (43264 = 208²).

The spelling of 631636948 in words is "six hundred thirty-one million, six hundred thirty-six thousand, nine hundred forty-eight".