6429820 has 24 divisors (see below), whose sum is σ = 13734000. Its totient is φ = 2527872.

The previous prime is 6429799. The next prime is 6429869. The reversal of 6429820 is 289246.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1545 + ... + 3904.

It is an arithmetic number, because the mean of its divisors is an integer number (572250).

Almost surely, 2^6429820 is an apocalyptic number.

It is an amenable number.

6429820 is an abundant number, since it is smaller than the sum of its proper divisors (7304180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6429820 is a wasteful number, since it uses less digits than its factorization.

6429820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5517 (or 5515 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 6429820 is about 2535.7089738375. The cubic root of 6429820 is about 185.9514653494.

The spelling of 6429820 in words is "six million, four hundred twenty-nine thousand, eight hundred twenty".