28898444 has 6 divisors (see below), whose sum is σ = 50572284. Its totient is φ = 14449220.

The previous prime is 28898393. The next prime is 28898447. The reversal of 28898444 is 44489882.

It is a super-2 number, since 2×28898444² = 1670240131242272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28898447) by changing a digit.

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, 3612302 + ... + 3612309.

It is an arithmetic number, because the mean of its divisors is an integer number (8428714).

Almost surely, 2^28898444 is an apocalyptic number.

It is an amenable number.

28898444 is a deficient number, since it is larger than the sum of its proper divisors (21673840).

28898444 is a wasteful number, since it uses less digits than its factorization.

28898444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7224615 (or 7224613 counting only the distinct ones).

The product of its digits is 589824, while the sum is 47.

The square root of 28898444 is about 5375.7272996312. The cubic root of 28898444 is about 306.8726283929.

The spelling of 28898444 in words is "twenty-eight million, eight hundred ninety-eight thousand, four hundred forty-four".