634976 has 12 divisors (see below), whose sum is σ = 1250172. Its totient is φ = 317472.

The previous prime is 634969. The next prime is 634979. The reversal of 634976 is 679436.

634976 = T₁₈₃ + T₁₈₄ + ... + T₂₁₄.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9890 + ... + 9953.

It is an arithmetic number, because the mean of its divisors is an integer number (104181).

2⁶³⁴⁹⁷⁶ is an apocalyptic number.

It is an amenable number.

634976 is a deficient number, since it is larger than the sum of its proper divisors (615196).

634976 is a wasteful number, since it uses less digits than its factorization.

634976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19853 (or 19845 counting only the distinct ones).

The product of its digits is 27216, while the sum is 35.

The square root of 634976 is about 796.8538134438. The cubic root of 634976 is about 85.9512974651.

The spelling of 634976 in words is "six hundred thirty-four thousand, nine hundred seventy-six".