7938406 has 16 divisors (see below), whose sum is σ = 13660416. Its totient is φ = 3389256.

The previous prime is 7938397. The next prime is 7938407. The reversal of 7938406 is 6048397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7938407) 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 7 ways as a sum of consecutive naturals, for example, 3375 + ... + 5221.

It is an arithmetic number, because the mean of its divisors is an integer number (853776).

Almost surely, 2^7938406 is an apocalyptic number.

7938406 is a deficient number, since it is larger than the sum of its proper divisors (5722010).

7938406 is a wasteful number, since it uses less digits than its factorization.

7938406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 7938406 is about 2817.5177018077. The cubic root of 7938406 is about 199.4853937041.

The spelling of 7938406 in words is "seven million, nine hundred thirty-eight thousand, four hundred six".