28907061 has 4 divisors (see below), whose sum is σ = 38542752. Its totient is φ = 19271372.

The previous prime is 28907059. The next prime is 28907063. The reversal of 28907061 is 16070982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (28907059) and next prime (28907063).

It is a cyclic number.

It is not a de Polignac number, because 28907061 - 2¹ = 28907059 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28907063) 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 3 ways as a sum of consecutive naturals, for example, 4817841 + ... + 4817846.

It is an arithmetic number, because the mean of its divisors is an integer number (9635688).

Almost surely, 2^28907061 is an apocalyptic number.

It is an amenable number.

28907061 is a deficient number, since it is larger than the sum of its proper divisors (9635691).

28907061 is an equidigital number, since it uses as much as digits as its factorization.

28907061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9635690.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 28907061 is about 5376.5287128407. The cubic root of 28907061 is about 306.9031266745.

The spelling of 28907061 in words is "twenty-eight million, nine hundred seven thousand, sixty-one".