7439906 has 8 divisors (see below), whose sum is σ = 11747280. Its totient is φ = 3524148.

The previous prime is 7439867. The next prime is 7439909. The reversal of 7439906 is 6099347.

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 195787 = 7439906 / (7 + 4 + 3 + 9 + 9 + 0 + 6).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 7439906.

It is not an unprimeable number, because it can be changed into a prime (7439909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97856 + ... + 97931.

It is an arithmetic number, because the mean of its divisors is an integer number (1468410).

Almost surely, 2^7439906 is an apocalyptic number.

7439906 is a deficient number, since it is larger than the sum of its proper divisors (4307374).

7439906 is a wasteful number, since it uses less digits than its factorization.

7439906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195808.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 7439906 is about 2727.6191083067. The cubic root of 7439906 is about 195.2191793672.

The spelling of 7439906 in words is "seven million, four hundred thirty-nine thousand, nine hundred six".