6909220 has 12 divisors (see below), whose sum is σ = 14509404. Its totient is φ = 2763680.

The previous prime is 6909173. The next prime is 6909247. The reversal of 6909220 is 229096.

It can be written as a sum of positive squares in 2 ways, for example, as 788544 + 6120676 = 888^2 + 2474^2 .

It is a plaindrome in base 11.

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 3 ways as a sum of consecutive naturals, for example, 172711 + ... + 172750.

It is an arithmetic number, because the mean of its divisors is an integer number (1209117).

Almost surely, 2^6909220 is an apocalyptic number.

It is an amenable number.

6909220 is an abundant number, since it is smaller than the sum of its proper divisors (7600184).

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

6909220 is a wasteful number, since it uses less digits than its factorization.

6909220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345470 (or 345468 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 6909220 is about 2628.5395184399. The cubic root of 6909220 is about 190.4625847623.

It can be divided in two parts, 6 and 909220, that added together give a triangular number (909226 = T₁₃₄₈).

The spelling of 6909220 in words is "six million, nine hundred nine thousand, two hundred twenty".