7639906 has 8 divisors (see below), whose sum is σ = 11487744. Its totient is φ = 3810660.

The previous prime is 7639883. The next prime is 7639913. The reversal of 7639906 is 6099367.

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

It is a d-powerful number, because it can be written as 7⁸ + 6² + 3¹³ + 9² + 9³ + 0 + 6⁷ .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3570 + ... + 5293.

It is an arithmetic number, because the mean of its divisors is an integer number (1435968).

Almost surely, 2^7639906 is an apocalyptic number.

7639906 is a deficient number, since it is larger than the sum of its proper divisors (3847838).

7639906 is a wasteful number, since it uses less digits than its factorization.

7639906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9296.

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 7639906 is about 2764.0379881615. The cubic root of 7639906 is about 196.9530323411.

The spelling of 7639906 in words is "seven million, six hundred thirty-nine thousand, nine hundred six".