28328465 has 16 divisors (see below), whose sum is σ = 37264320. Its totient is φ = 20502720.

The previous prime is 28328459. The next prime is 28328467. The reversal of 28328465 is 56482382.

It is not a de Polignac number, because 28328465 - 2⁶ = 28328401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28328467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11351 + ... + 13619.

It is an arithmetic number, because the mean of its divisors is an integer number (2329020).

Almost surely, 2^28328465 is an apocalyptic number.

It is an amenable number.

28328465 is a deficient number, since it is larger than the sum of its proper divisors (8935855).

28328465 is a wasteful number, since it uses less digits than its factorization.

28328465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2512.

The product of its digits is 92160, while the sum is 38.

The square root of 28328465 is about 5322.4491542898. The cubic root of 28328465 is about 304.8416808009.

The spelling of 28328465 in words is "twenty-eight million, three hundred twenty-eight thousand, four hundred sixty-five".