6909444 has 18 divisors (see below), whose sum is σ = 17465630. Its totient is φ = 2303136.

The previous prime is 6909439. The next prime is 6909449. The reversal of 6909444 is 4449096.

It is an interprime number because it is at equal distance from previous prime (6909439) and next prime (6909449).

It can be written as a sum of positive squares in only one way, i.e., 6812100 + 97344 = 2610^2 + 312^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 191929 = 6909444 / (6 + 9 + 0 + 9 + 4 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 6909399 and 6909408.

It is not an unprimeable number, because it can be changed into a prime (6909449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 95929 + ... + 96000.

Almost surely, 2^6909444 is an apocalyptic number.

It is an amenable number.

6909444 is an abundant number, since it is smaller than the sum of its proper divisors (10556186).

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

6909444 is a wasteful number, since it uses less digits than its factorization.

6909444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191939 (or 191934 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 6909444 is about 2628.5821273074. The cubic root of 6909444 is about 190.4646430341.

The spelling of 6909444 in words is "six million, nine hundred nine thousand, four hundred forty-four".