28433001 has 4 divisors (see below), whose sum is σ = 37910672. Its totient is φ = 18955332.

The previous prime is 28432997. The next prime is 28433011. The reversal of 28433001 is 10033482.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28433001 - 2² = 28432997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28433011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4738831 + ... + 4738836.

It is an arithmetic number, because the mean of its divisors is an integer number (9477668).

Almost surely, 2^28433001 is an apocalyptic number.

It is an amenable number.

28433001 is a deficient number, since it is larger than the sum of its proper divisors (9477671).

28433001 is an equidigital number, since it uses as much as digits as its factorization.

28433001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9477670.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 28433001 is about 5332.2604024935. The cubic root of 28433001 is about 305.2161900010.

Adding to 28433001 its reverse (10033482), we get a palindrome (38466483).

The spelling of 28433001 in words is "twenty-eight million, four hundred thirty-three thousand, one".