28433401 has 4 divisors (see below), whose sum is σ = 30105972. Its totient is φ = 26760832.

The previous prime is 28433389. The next prime is 28433407. The reversal of 28433401 is 10433482.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14175225 + 14258176 = 3765^2 + 3776^2 .

It is a cyclic number.

It is not a de Polignac number, because 28433401 - 2⁹ = 28432889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28433407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836260 + ... + 836293.

It is an arithmetic number, because the mean of its divisors is an integer number (7526493).

Almost surely, 2^28433401 is an apocalyptic number.

It is an amenable number.

28433401 is a deficient number, since it is larger than the sum of its proper divisors (1672571).

28433401 is a wasteful number, since it uses less digits than its factorization.

28433401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672570.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 28433401 is about 5332.2979099071. The cubic root of 28433401 is about 305.2176212710.

Adding to 28433401 its reverse (10433482), we get a palindrome (38866883).

The spelling of 28433401 in words is "twenty-eight million, four hundred thirty-three thousand, four hundred one".