28577001 has 4 divisors (see below), whose sum is σ = 38102672. Its totient is φ = 19051332.

The previous prime is 28576993. The next prime is 28577023. The reversal of 28577001 is 10077582.

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 28577001 - 2³ = 28576993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28577001.

It is not an unprimeable number, because it can be changed into a prime (28570001) 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, 4762831 + ... + 4762836.

It is an arithmetic number, because the mean of its divisors is an integer number (9525668).

Almost surely, 2^28577001 is an apocalyptic number.

It is an amenable number.

28577001 is a deficient number, since it is larger than the sum of its proper divisors (9525671).

28577001 is an equidigital number, since it uses as much as digits as its factorization.

28577001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9525670.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 28577001 is about 5345.7460657985. The cubic root of 28577001 is about 305.7305822036.

The spelling of 28577001 in words is "twenty-eight million, five hundred seventy-seven thousand, one".