28719365 has 8 divisors (see below), whose sum is σ = 34642968. Its totient is φ = 22855680.

The previous prime is 28719343. The next prime is 28719373. The reversal of 28719365 is 56391782.

It can be written as a sum of positive squares in 4 ways, for example, as 484 + 28718881 = 22^2 + 5359^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28719365 - 2⁸ = 28719109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13916 + ... + 15845.

It is an arithmetic number, because the mean of its divisors is an integer number (4330371).

Almost surely, 2^28719365 is an apocalyptic number.

It is an amenable number.

28719365 is a deficient number, since it is larger than the sum of its proper divisors (5923603).

28719365 is a wasteful number, since it uses less digits than its factorization.

28719365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29959.

The product of its digits is 90720, while the sum is 41.

The square root of 28719365 is about 5359.0451574884. The cubic root of 28719365 is about 306.2374344421.

The spelling of 28719365 in words is "twenty-eight million, seven hundred nineteen thousand, three hundred sixty-five".