28613907 has 24 divisors (see below), whose sum is σ = 50016096. Its totient is φ = 15388416.

The previous prime is 28613903. The next prime is 28613911. The reversal of 28613907 is 70931682.

It is an interprime number because it is at equal distance from previous prime (28613903) and next prime (28613911).

It is not a de Polignac number, because 28613907 - 2² = 28613903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28613903) 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 23 ways as a sum of consecutive naturals, for example, 12288 + ... + 14429.

It is an arithmetic number, because the mean of its divisors is an integer number (2084004).

Almost surely, 2^28613907 is an apocalyptic number.

28613907 is a deficient number, since it is larger than the sum of its proper divisors (21402189).

28613907 is a wasteful number, since it uses less digits than its factorization.

28613907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26747 (or 26744 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 28613907 is about 5349.1968556037. The cubic root of 28613907 is about 305.8621383345.

The spelling of 28613907 in words is "twenty-eight million, six hundred thirteen thousand, nine hundred seven".