7220688 has 20 divisors (see below), whose sum is σ = 18653568. Its totient is φ = 2406880.

The previous prime is 7220677. The next prime is 7220693. The reversal of 7220688 is 8860227.

7220688 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75168 + ... + 75263.

Almost surely, 2^7220688 is an apocalyptic number.

It is an amenable number.

7220688 is an abundant number, since it is smaller than the sum of its proper divisors (11432880).

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

7220688 is a wasteful number, since it uses less digits than its factorization.

7220688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150442 (or 150436 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 7220688 is about 2687.1337890027. The cubic root of 7220688 is about 193.2826449227.

The spelling of 7220688 in words is "seven million, two hundred twenty thousand, six hundred eighty-eight".