28659901 has 2 divisors, whose sum is σ = 28659902. Its totient is φ = 28659900.

The previous prime is 28659889. The next prime is 28659937. The reversal of 28659901 is 10995682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28408900 + 251001 = 5330^2 + 501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28659901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28659971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14329950 + 14329951.

It is an arithmetic number, because the mean of its divisors is an integer number (14329951).

Almost surely, 2^28659901 is an apocalyptic number.

It is an amenable number.

28659901 is a deficient number, since it is larger than the sum of its proper divisors (1).

28659901 is an equidigital number, since it uses as much as digits as its factorization.

28659901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 28659901 is about 5353.4942794403. The cubic root of 28659901 is about 306.0259315601.

The spelling of 28659901 in words is "twenty-eight million, six hundred fifty-nine thousand, nine hundred one".