7217628 has 24 divisors (see below), whose sum is σ = 18372480. Its totient is φ = 2187120.

The previous prime is 7217611. The next prime is 7217629. The reversal of 7217628 is 8267127.

7217628 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7217629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27208 + ... + 27471.

It is an arithmetic number, because the mean of its divisors is an integer number (765520).

Almost surely, 2^7217628 is an apocalyptic number.

It is an amenable number.

7217628 is an abundant number, since it is smaller than the sum of its proper divisors (11154852).

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

7217628 is a wasteful number, since it uses less digits than its factorization.

7217628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54697 (or 54695 counting only the distinct ones).

The product of its digits is 9408, while the sum is 33.

The square root of 7217628 is about 2686.5643487547. The cubic root of 7217628 is about 193.2553378083.

The spelling of 7217628 in words is "seven million, two hundred seventeen thousand, six hundred twenty-eight".