28442007 has 24 divisors (see below), whose sum is σ = 46770048. Its totient is φ = 16486800.

The previous prime is 28441981. The next prime is 28442009. The reversal of 28442007 is 70024482.

It is not a de Polignac number, because 28442007 - 2⁶ = 28441943 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28442009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3969 + ... + 8522.

It is an arithmetic number, because the mean of its divisors is an integer number (1948752).

Almost surely, 2^28442007 is an apocalyptic number.

28442007 is a deficient number, since it is larger than the sum of its proper divisors (18328041).

28442007 is a wasteful number, since it uses less digits than its factorization.

28442007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12531 (or 12528 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 28442007 is about 5333.1048180211. The cubic root of 28442007 is about 305.2484117942.

Adding to 28442007 its reverse (70024482), we get a palindrome (98466489).

It can be divided in two parts, 2844 and 2007, that added together give a triangular number (4851 = T₉₈).

The spelling of 28442007 in words is "twenty-eight million, four hundred forty-two thousand, seven".