646029 has 16 divisors (see below), whose sum is σ = 973440. Its totient is φ = 423360.

The previous prime is 646027. The next prime is 646039. The reversal of 646029 is 920646.

It is not a de Polignac number, because 646029 - 2¹ = 646027 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 645993 and 646011.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 646029.

It is not an unprimeable number, because it can be changed into a prime (646027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1749 + ... + 2085.

It is an arithmetic number, because the mean of its divisors is an integer number (60840).

2⁶⁴⁶⁰²⁹ is an apocalyptic number.

It is an amenable number.

646029 is a deficient number, since it is larger than the sum of its proper divisors (327411).

646029 is a wasteful number, since it uses less digits than its factorization.

646029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 646029 is about 803.7592923258. The cubic root of 646029 is about 86.4471482635.

The spelling of 646029 in words is "six hundred forty-six thousand, twenty-nine".