2238428 has 12 divisors (see below), whose sum is σ = 4123560. Its totient is φ = 1060272.

The previous prime is 2238421. The next prime is 2238473. The reversal of 2238428 is 8248322.

2238428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2238428² = 10021119822368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2238428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2238421) 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 3 ways as a sum of consecutive naturals, for example, 14651 + ... + 14802.

It is an arithmetic number, because the mean of its divisors is an integer number (343630).

2^2238428 is an apocalyptic number.

It is an amenable number.

2238428 is a deficient number, since it is larger than the sum of its proper divisors (1885132).

2238428 is a wasteful number, since it uses less digits than its factorization.

2238428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29476 (or 29474 counting only the distinct ones).

The product of its digits is 6144, while the sum is 29.

The square root of 2238428 is about 1496.1376941980. The cubic root of 2238428 is about 130.8120374099.

The spelling of 2238428 in words is "two million, two hundred thirty-eight thousand, four hundred twenty-eight".