28016465 has 16 divisors (see below), whose sum is σ = 35527680. Its totient is φ = 21174720.

The previous prime is 28016441. The next prime is 28016477. The reversal of 28016465 is 56461082.

It is not a de Polignac number, because 28016465 - 2¹⁰ = 28015441 is a prime.

It is a super-2 number, since 2×28016465² = 1569844622192450, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4760 + ... + 8870.

It is an arithmetic number, because the mean of its divisors is an integer number (2220480).

Almost surely, 2^28016465 is an apocalyptic number.

It is an amenable number.

28016465 is a deficient number, since it is larger than the sum of its proper divisors (7511215).

28016465 is a wasteful number, since it uses less digits than its factorization.

28016465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4192.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 28016465 is about 5293.0581897425. The cubic root of 28016465 is about 303.7184062834.

The spelling of 28016465 in words is "twenty-eight million, sixteen thousand, four hundred sixty-five".