4256820 has 48 divisors (see below), whose sum is σ = 13245120. Its totient is φ = 1135008.

The previous prime is 4256807. The next prime is 4256831. The reversal of 4256820 is 286524.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3402 + ... + 4481.

It is an arithmetic number, because the mean of its divisors is an integer number (275940).

Almost surely, 2^4256820 is an apocalyptic number.

It is an amenable number.

4256820 is an abundant number, since it is smaller than the sum of its proper divisors (8988300).

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

4256820 is a wasteful number, since it uses less digits than its factorization.

4256820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7901 (or 7893 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 4256820 is about 2063.2062427203. The cubic root of 4256820 is about 162.0671874945.

The spelling of 4256820 in words is "four million, two hundred fifty-six thousand, eight hundred twenty".