7219428 has 24 divisors (see below), whose sum is σ = 16944480. Its totient is φ = 2392320.

The previous prime is 7219427. The next prime is 7219469. The reversal of 7219428 is 8249127.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (7219427) 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, 468 + ... + 3828.

It is an arithmetic number, because the mean of its divisors is an integer number (706020).

Almost surely, 2^7219428 is an apocalyptic number.

It is an amenable number.

7219428 is an abundant number, since it is smaller than the sum of its proper divisors (9725052).

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

7219428 is a wasteful number, since it uses less digits than its factorization.

7219428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3547 (or 3545 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 7219428 is about 2686.8993282220. The cubic root of 7219428 is about 193.2714017513.

The spelling of 7219428 in words is "seven million, two hundred nineteen thousand, four hundred twenty-eight".