28334428 has 6 divisors (see below), whose sum is σ = 49585256. Its totient is φ = 14167212.

The previous prime is 28334417. The next prime is 28334429. The reversal of 28334428 is 82443382.

It is a junction number, because it is equal to n+sod(n) for n = 28334393 and 28334402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28334429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3541800 + ... + 3541807.

Almost surely, 2^28334428 is an apocalyptic number.

It is an amenable number.

28334428 is a deficient number, since it is larger than the sum of its proper divisors (21250828).

28334428 is a wasteful number, since it uses less digits than its factorization.

28334428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7083611 (or 7083609 counting only the distinct ones).

The product of its digits is 36864, while the sum is 34.

The square root of 28334428 is about 5323.0092992592. The cubic root of 28334428 is about 304.8630685160.

The spelling of 28334428 in words is "twenty-eight million, three hundred thirty-four thousand, four hundred twenty-eight".