28084377 has 4 divisors (see below), whose sum is σ = 37445840. Its totient is φ = 18722916.

The previous prime is 28084361. The next prime is 28084393. The reversal of 28084377 is 77348082.

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 an interprime number because it is at equal distance from previous prime (28084361) and next prime (28084393).

It is not a de Polignac number, because 28084377 - 2⁴ = 28084361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28084307) 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, 4680727 + ... + 4680732.

It is an arithmetic number, because the mean of its divisors is an integer number (9361460).

Almost surely, 2^28084377 is an apocalyptic number.

It is an amenable number.

28084377 is a deficient number, since it is larger than the sum of its proper divisors (9361463).

28084377 is an equidigital number, since it uses as much as digits as its factorization.

28084377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9361462.

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 28084377 is about 5299.4695017520. The cubic root of 28084377 is about 303.9636130560.

The spelling of 28084377 in words is "twenty-eight million, eighty-four thousand, three hundred seventy-seven".