6909428 has 12 divisors (see below), whose sum is σ = 12173700. Its totient is φ = 3431232.

The previous prime is 6909391. The next prime is 6909437. The reversal of 6909428 is 8249096.

It can be written as a sum of positive squares in 2 ways, for example, as 3888784 + 3020644 = 1972^2 + 1738^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6909391 and 6909400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5201 + ... + 6392.

It is an arithmetic number, because the mean of its divisors is an integer number (1014475).

Almost surely, 2^6909428 is an apocalyptic number.

It is an amenable number.

6909428 is a deficient number, since it is larger than the sum of its proper divisors (5264272).

6909428 is a wasteful number, since it uses less digits than its factorization.

6909428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11746 (or 11744 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 6909428 is about 2628.5790838398. The cubic root of 6909428 is about 190.4644960161.

It can be divided in two parts, 6909 and 428, that added together give a palindrome (7337).

The spelling of 6909428 in words is "six million, nine hundred nine thousand, four hundred twenty-eight".