28727701 has 2 divisors, whose sum is σ = 28727702. Its totient is φ = 28727700.

The previous prime is 28727689. The next prime is 28727723. The reversal of 28727701 is 10772782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14814801 + 13912900 = 3849^2 + 3730^2 .

It is a cyclic number.

It is not a de Polignac number, because 28727701 - 2⁹ = 28727189 is a prime.

It is equal to p_1783852 and since 28727701 and 1783852 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28727801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14363850 + 14363851.

It is an arithmetic number, because the mean of its divisors is an integer number (14363851).

Almost surely, 2^28727701 is an apocalyptic number.

It is an amenable number.

28727701 is a deficient number, since it is larger than the sum of its proper divisors (1).

28727701 is an equidigital number, since it uses as much as digits as its factorization.

28727701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 28727701 is about 5359.8228515502. The cubic root of 28727701 is about 306.2670607738.

The spelling of 28727701 in words is "twenty-eight million, seven hundred twenty-seven thousand, seven hundred one".