629864 has 16 divisors (see below), whose sum is σ = 1209120. Its totient is φ = 307440.

The previous prime is 629861. The next prime is 629873. The reversal of 629864 is 468926.

629864 = T₂₁₇ + T₂₁₈ + ... + T₂₄₀.

It is not an unprimeable number, because it can be changed into a prime (629861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572 + ... + 1259.

It is an arithmetic number, because the mean of its divisors is an integer number (75570).

629864 is a Friedman number, since it can be written as 8+6^9/(4+6*2), using all its digits and the basic arithmetic operations.

2⁶²⁹⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

629864 is a deficient number, since it is larger than the sum of its proper divisors (579256).

629864 is a wasteful number, since it uses less digits than its factorization.

629864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880 (or 1876 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 629864 is about 793.6397167481. The cubic root of 629864 is about 85.7200197222.

The spelling of 629864 in words is "six hundred twenty-nine thousand, eight hundred sixty-four".