28028007 has 54 divisors (see below), whose sum is σ = 50092952. Its totient is φ = 14791392.

The previous prime is 28027991. The next prime is 28028029. The reversal of 28028007 is 70082082.

It is not a de Polignac number, because 28028007 - 2⁴ = 28027991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28028057) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 966469 + ... + 966497.

Almost surely, 2^28028007 is an apocalyptic number.

28028007 is a deficient number, since it is larger than the sum of its proper divisors (22064945).

28028007 is a wasteful number, since it uses less digits than its factorization.

28028007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 28028007 is about 5294.1483734402. The cubic root of 28028007 is about 303.7601083869.

Multiplying 28028007 by its product of nonzero digits (1792), we get a square (50226188544 = 224112²).

The spelling of 28028007 in words is "twenty-eight million, twenty-eight thousand, seven".