28870927 has 2 divisors, whose sum is σ = 28870928. Its totient is φ = 28870926.

The previous prime is 28870859. The next prime is 28870949. The reversal of 28870927 is 72907882.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28870927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28870967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14435463 + 14435464.

It is an arithmetic number, because the mean of its divisors is an integer number (14435464).

Almost surely, 2^28870927 is an apocalyptic number.

28870927 is a deficient number, since it is larger than the sum of its proper divisors (1).

28870927 is an equidigital number, since it uses as much as digits as its factorization.

28870927 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 28870927 is about 5373.1673154667. The cubic root of 28870927 is about 306.7751964375.

The spelling of 28870927 in words is "twenty-eight million, eight hundred seventy thousand, nine hundred twenty-seven".