8728465 has 4 divisors (see below), whose sum is σ = 10474164. Its totient is φ = 6982768.

The previous prime is 8728457. The next prime is 8728471. The reversal of 8728465 is 5648278.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5648278 = 2 ⋅2824139.

It can be written as a sum of positive squares in 2 ways, for example, as 2808976 + 5919489 = 1676^2 + 2433^2 .

It is a cyclic number.

It is not a de Polignac number, because 8728465 - 2³ = 8728457 is a prime.

It is a super-2 number, since 2×8728465² = 152372202512450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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, 872842 + ... + 872851.

It is an arithmetic number, because the mean of its divisors is an integer number (2618541).

Almost surely, 2^8728465 is an apocalyptic number.

It is an amenable number.

8728465 is a deficient number, since it is larger than the sum of its proper divisors (1745699).

8728465 is a wasteful number, since it uses less digits than its factorization.

8728465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745698.

The product of its digits is 107520, while the sum is 40.

The square root of 8728465 is about 2954.3975697255. The cubic root of 8728465 is about 205.8950749161.

The spelling of 8728465 in words is "eight million, seven hundred twenty-eight thousand, four hundred sixty-five".