28150801 has 4 divisors (see below), whose sum is σ = 32172352. Its totient is φ = 24129252.

The previous prime is 28150777. The next prime is 28150807. The reversal of 28150801 is 10805182.

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 28150801 - 2⁵ = 28150769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28150807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2010765 + ... + 2010778.

It is an arithmetic number, because the mean of its divisors is an integer number (8043088).

Almost surely, 2^28150801 is an apocalyptic number.

It is an amenable number.

28150801 is a deficient number, since it is larger than the sum of its proper divisors (4021551).

28150801 is an equidigital number, since it uses as much as digits as its factorization.

28150801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4021550.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 28150801 is about 5305.7328428785. The cubic root of 28150801 is about 304.2030650714.

Adding to 28150801 its reverse (10805182), we get a palindrome (38955983).

The spelling of 28150801 in words is "twenty-eight million, one hundred fifty thousand, eight hundred one".