28725071 has 2 divisors, whose sum is σ = 28725072. Its totient is φ = 28725070.

The previous prime is 28725049. The next prime is 28725079. The reversal of 28725071 is 17052782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28725071 - 2¹⁸ = 28462927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28725079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14362535 + 14362536.

It is an arithmetic number, because the mean of its divisors is an integer number (14362536).

Almost surely, 2^28725071 is an apocalyptic number.

28725071 is a deficient number, since it is larger than the sum of its proper divisors (1).

28725071 is an equidigital number, since it uses as much as digits as its factorization.

28725071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 28725071 is about 5359.5775020052. The cubic root of 28725071 is about 306.2577143135.

The spelling of 28725071 in words is "twenty-eight million, seven hundred twenty-five thousand, seventy-one".