28249544 has 8 divisors (see below), whose sum is σ = 52967910. Its totient is φ = 14124768.

The previous prime is 28249541. The next prime is 28249549. The reversal of 28249544 is 44594282.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 26112100 + 2137444 = 5110^2 + 1462^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 28249498 and 28249507.

It is not an unprimeable number, because it can be changed into a prime (28249541) 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, 1765589 + ... + 1765604.

Almost surely, 2^28249544 is an apocalyptic number.

It is an amenable number.

28249544 is a deficient number, since it is larger than the sum of its proper divisors (24718366).

28249544 is a wasteful number, since it uses less digits than its factorization.

28249544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3531199 (or 3531195 counting only the distinct ones).

The product of its digits is 92160, while the sum is 38.

The square root of 28249544 is about 5315.0300093226. The cubic root of 28249544 is about 304.5583287428.

The spelling of 28249544 in words is "twenty-eight million, two hundred forty-nine thousand, five hundred forty-four".