28485428 has 6 divisors (see below), whose sum is σ = 49849506. Its totient is φ = 14242712.

The previous prime is 28485419. The next prime is 28485473. The reversal of 28485428 is 82458482.

It can be written as a sum of positive squares in only one way, i.e., 28281124 + 204304 = 5318^2 + 452^2 .

It is a super-2 number, since 2×28485428² = 1622839216686368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3560675 + ... + 3560682.

It is an arithmetic number, because the mean of its divisors is an integer number (8308251).

Almost surely, 2^28485428 is an apocalyptic number.

It is an amenable number.

28485428 is a deficient number, since it is larger than the sum of its proper divisors (21364078).

28485428 is a wasteful number, since it uses less digits than its factorization.

28485428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7121361 (or 7121359 counting only the distinct ones).

The product of its digits is 163840, while the sum is 41.

The square root of 28485428 is about 5337.1741586724. The cubic root of 28485428 is about 305.4036686784.

The spelling of 28485428 in words is "twenty-eight million, four hundred eighty-five thousand, four hundred twenty-eight".