7291668 has 24 divisors (see below), whose sum is σ = 17909920. Its totient is φ = 2302560.

The previous prime is 7291663. The next prime is 7291693. The reversal of 7291668 is 8661927.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7291663) 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, 15763 + ... + 16218.

Almost surely, 2^7291668 is an apocalyptic number.

It is an amenable number.

7291668 is an abundant number, since it is smaller than the sum of its proper divisors (10618252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7291668 is a wasteful number, since it uses less digits than its factorization.

7291668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32007 (or 32005 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 7291668 is about 2700.3088712220. The cubic root of 7291668 is about 193.9139094404.

The spelling of 7291668 in words is "seven million, two hundred ninety-one thousand, six hundred sixty-eight".