7921630 has 8 divisors (see below), whose sum is σ = 14258952. Its totient is φ = 3168648.

The previous prime is 7921621. The next prime is 7921631. The reversal of 7921630 is 361297.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396072 + ... + 396091.

It is an arithmetic number, because the mean of its divisors is an integer number (1782369).

Almost surely, 2^7921630 is an apocalyptic number.

7921630 is a deficient number, since it is larger than the sum of its proper divisors (6337322).

7921630 is a wasteful number, since it uses less digits than its factorization.

7921630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792170.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 7921630 is about 2814.5390386349. The cubic root of 7921630 is about 199.3447723948.

The spelling of 7921630 in words is "seven million, nine hundred twenty-one thousand, six hundred thirty".