6404756 has 12 divisors (see below), whose sum is σ = 11392500. Its totient is φ = 3149760.

The previous prime is 6404753. The next prime is 6404771. The reversal of 6404756 is 6574046.

It can be written as a sum of positive squares in 2 ways, for example, as 2202256 + 4202500 = 1484^2 + 2050^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404753) by changing a digit.

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, 12881 + ... + 13368.

It is an arithmetic number, because the mean of its divisors is an integer number (949375).

Almost surely, 2^6404756 is an apocalyptic number.

It is an amenable number.

6404756 is a deficient number, since it is larger than the sum of its proper divisors (4987744).

6404756 is a wasteful number, since it uses less digits than its factorization.

6404756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26314 (or 26312 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 6404756 is about 2530.7619406021. The cubic root of 6404756 is about 185.7095323664.

The spelling of 6404756 in words is "six million, four hundred four thousand, seven hundred fifty-six".