6906404 has 6 divisors (see below), whose sum is σ = 12086214. Its totient is φ = 3453200.

The previous prime is 6906401. The next prime is 6906407. The reversal of 6906404 is 4046096.

It is an interprime number because it is at equal distance from previous prime (6906401) and next prime (6906407).

It can be written as a sum of positive squares in only one way, i.e., 5808100 + 1098304 = 2410^2 + 1048^2 .

It is a super-2 number, since 2×6906404² = 95396832422432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6906401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 863297 + ... + 863304.

It is an arithmetic number, because the mean of its divisors is an integer number (2014369).

Almost surely, 2^6906404 is an apocalyptic number.

It is an amenable number.

6906404 is a deficient number, since it is larger than the sum of its proper divisors (5179810).

6906404 is a wasteful number, since it uses less digits than its factorization.

6906404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726605 (or 1726603 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 6906404 is about 2628.0038051723. The cubic root of 6906404 is about 190.4367055496.

The spelling of 6906404 in words is "six million, nine hundred six thousand, four hundred four".