28662001 has 2 divisors, whose sum is σ = 28662002. Its totient is φ = 28662000.

The previous prime is 28661999. The next prime is 28662019. The reversal of 28662001 is 10026682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19571776 + 9090225 = 4424^2 + 3015^2 .

It is a cyclic number.

It is not a de Polignac number, because 28662001 - 2¹ = 28661999 is a prime.

Together with 28661999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28662031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14331000 + 14331001.

It is an arithmetic number, because the mean of its divisors is an integer number (14331001).

Almost surely, 2^28662001 is an apocalyptic number.

It is an amenable number.

28662001 is a deficient number, since it is larger than the sum of its proper divisors (1).

28662001 is an equidigital number, since it uses as much as digits as its factorization.

28662001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 28662001 is about 5353.6904094279. The cubic root of 28662001 is about 306.0334058678.

Adding to 28662001 its reverse (10026682), we get a palindrome (38688683).

The spelling of 28662001 in words is "twenty-eight million, six hundred sixty-two thousand, one".