7408906 has 8 divisors (see below), whose sum is σ = 11767140. Its totient is φ = 3486528.

The previous prime is 7408903. The next prime is 7408909. The reversal of 7408906 is 6098047.

It is an interprime number because it is at equal distance from previous prime (7408903) and next prime (7408909).

It can be written as a sum of positive squares in 2 ways, for example, as 7338681 + 70225 = 2709^2 + 265^2 .

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 (34), and also a Moran number because the ratio is a prime number: 217909 = 7408906 / (7 + 4 + 0 + 8 + 9 + 0 + 6).

It is not an unprimeable number, because it can be changed into a prime (7408901) 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, 108921 + ... + 108988.

Almost surely, 2^7408906 is an apocalyptic number.

7408906 is the 1722-nd centered pentagonal number.

7408906 is a deficient number, since it is larger than the sum of its proper divisors (4358234).

7408906 is a wasteful number, since it uses less digits than its factorization.

7408906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217928.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 7408906 is about 2721.9305648749. The cubic root of 7408906 is about 194.9476607284.

The spelling of 7408906 in words is "seven million, four hundred eight thousand, nine hundred six".