6404031 has 12 divisors (see below), whose sum is σ = 9362808. Its totient is φ = 4217424.

The previous prime is 6404023. The next prime is 6404059. The reversal of 6404031 is 1304046.

It is not a de Polignac number, because 6404031 - 2³ = 6404023 is a prime.

It is a super-2 number, since 2×6404031² = 82023226097922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6403995 and 6404013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3540 + ... + 5033.

It is an arithmetic number, because the mean of its divisors is an integer number (780234).

Almost surely, 2^6404031 is an apocalyptic number.

6404031 is a deficient number, since it is larger than the sum of its proper divisors (2958777).

6404031 is a wasteful number, since it uses less digits than its factorization.

6404031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8662 (or 8659 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 6404031 is about 2530.6186990537. The cubic root of 6404031 is about 185.7025248399.

Adding to 6404031 its reverse (1304046), we get a palindrome (7708077).

The spelling of 6404031 in words is "six million, four hundred four thousand, thirty-one".