28055007 has 6 divisors (see below), whose sum is σ = 40523912. Its totient is φ = 18703332.

The previous prime is 28055003. The next prime is 28055017. The reversal of 28055007 is 70055082.

It is a happy number.

It is not a de Polignac number, because 28055007 - 2² = 28055003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28055003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1558603 + ... + 1558620.

Almost surely, 2^28055007 is an apocalyptic number.

28055007 is a deficient number, since it is larger than the sum of its proper divisors (12468905).

28055007 is a wasteful number, since it uses less digits than its factorization.

28055007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3117229 (or 3117226 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 28055007 is about 5296.6977448218. The cubic root of 28055007 is about 303.8576166966.

The spelling of 28055007 in words is "twenty-eight million, fifty-five thousand, seven".