28750361 has 4 divisors (see below), whose sum is σ = 29677824. Its totient is φ = 27822900.

The previous prime is 28750321. The next prime is 28750411. The reversal of 28750361 is 16305782.

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 a cyclic number.

It is not a de Polignac number, because 28750361 - 2¹⁴ = 28733977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28750301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463685 + ... + 463746.

It is an arithmetic number, because the mean of its divisors is an integer number (7419456).

Almost surely, 2^28750361 is an apocalyptic number.

It is an amenable number.

28750361 is a deficient number, since it is larger than the sum of its proper divisors (927463).

28750361 is an equidigital number, since it uses as much as digits as its factorization.

28750361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927462.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 28750361 is about 5361.9363106997. The cubic root of 28750361 is about 306.3475659706.

The spelling of 28750361 in words is "twenty-eight million, seven hundred fifty thousand, three hundred sixty-one".