28545401 has 2 divisors, whose sum is σ = 28545402. Its totient is φ = 28545400.

The previous prime is 28545379. The next prime is 28545437. The reversal of 28545401 is 10454582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20839225 + 7706176 = 4565^2 + 2776^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28545401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28545481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14272700 + 14272701.

It is an arithmetic number, because the mean of its divisors is an integer number (14272701).

Almost surely, 2^28545401 is an apocalyptic number.

It is an amenable number.

28545401 is a deficient number, since it is larger than the sum of its proper divisors (1).

28545401 is an equidigital number, since it uses as much as digits as its factorization.

28545401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 28545401 is about 5342.7896271517. The cubic root of 28545401 is about 305.6178499449.

Adding to 28545401 its reverse (10454582), we get a palindrome (38999983).

The spelling of 28545401 in words is "twenty-eight million, five hundred forty-five thousand, four hundred one".