6406138 has 8 divisors (see below), whose sum is σ = 9752832. Its totient is φ = 3155196.

The previous prime is 6406123. The next prime is 6406151. The reversal of 6406138 is 8316046.

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

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, 23770 + ... + 24037.

It is an arithmetic number, because the mean of its divisors is an integer number (1219104).

Almost surely, 2^6406138 is an apocalyptic number.

6406138 is a deficient number, since it is larger than the sum of its proper divisors (3346694).

6406138 is a wasteful number, since it uses less digits than its factorization.

6406138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47876.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 6406138 is about 2531.0349661749. The cubic root of 6406138 is about 185.7228886970.

The spelling of 6406138 in words is "six million, four hundred six thousand, one hundred thirty-eight".