6403694 has 8 divisors (see below), whose sum is σ = 10478808. Its totient is φ = 2910760.

The previous prime is 6403687. The next prime is 6403711. The reversal of 6403694 is 4963046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6403694.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145517 + ... + 145560.

It is an arithmetic number, because the mean of its divisors is an integer number (1309851).

Almost surely, 2^6403694 is an apocalyptic number.

6403694 is a deficient number, since it is larger than the sum of its proper divisors (4075114).

6403694 is a wasteful number, since it uses less digits than its factorization.

6403694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291090.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 6403694 is about 2530.5521136701. The cubic root of 6403694 is about 185.6992673682.

It can be divided in two parts, 640 and 3694, that added together give a palindrome (4334).

The spelling of 6403694 in words is "six million, four hundred three thousand, six hundred ninety-four".