28915007 has 6 divisors (see below), whose sum is σ = 31782744. Its totient is φ = 26286260.

The previous prime is 28914997. The next prime is 28915013. The reversal of 28915007 is 70051982.

It is not a de Polignac number, because 28915007 - 2²⁰ = 27866431 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 (28915097) 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, 119363 + ... + 119604.

It is an arithmetic number, because the mean of its divisors is an integer number (5297124).

Almost surely, 2^28915007 is an apocalyptic number.

28915007 is a deficient number, since it is larger than the sum of its proper divisors (2867737).

28915007 is a wasteful number, since it uses less digits than its factorization.

28915007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238989 (or 238978 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 28915007 is about 5377.2676146906. The cubic root of 28915007 is about 306.9312447046.

Adding to 28915007 its reverse (70051982), we get a palindrome (98966989).

The spelling of 28915007 in words is "twenty-eight million, nine hundred fifteen thousand, seven".