28388007 has 6 divisors (see below), whose sum is σ = 41004912. Its totient is φ = 18925332.

The previous prime is 28387999. The next prime is 28388023. The reversal of 28388007 is 70088382.

It is not a de Polignac number, because 28388007 - 2³ = 28387999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28388077) 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 in 5 ways as a sum of consecutive naturals, for example, 1577103 + ... + 1577120.

It is an arithmetic number, because the mean of its divisors is an integer number (6834152).

Almost surely, 2^28388007 is an apocalyptic number.

28388007 is a deficient number, since it is larger than the sum of its proper divisors (12616905).

28388007 is a wasteful number, since it uses less digits than its factorization.

28388007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3154229 (or 3154226 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 28388007 is about 5328.0396957981. The cubic root of 28388007 is about 305.0551078423.

The spelling of 28388007 in words is "twenty-eight million, three hundred eighty-eight thousand, seven".