28532401 has 2 divisors, whose sum is σ = 28532402. Its totient is φ = 28532400.

The previous prime is 28532389. The next prime is 28532407. The reversal of 28532401 is 10423582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28143025 + 389376 = 5305^2 + 624^2 .

It is a cyclic number.

It is not a de Polignac number, because 28532401 - 2²¹ = 26435249 is a prime.

It is not a weakly prime, because it can be changed into another prime (28532407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14266200 + 14266201.

It is an arithmetic number, because the mean of its divisors is an integer number (14266201).

Almost surely, 2^28532401 is an apocalyptic number.

It is an amenable number.

28532401 is a deficient number, since it is larger than the sum of its proper divisors (1).

28532401 is an equidigital number, since it uses as much as digits as its factorization.

28532401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 28532401 is about 5341.5728956928. The cubic root of 28532401 is about 305.5714485960.

Adding to 28532401 its reverse (10423582), we get a palindrome (38955983).

The spelling of 28532401 in words is "twenty-eight million, five hundred thirty-two thousand, four hundred one".