28480465 has 24 divisors (see below), whose sum is σ = 38191608. Its totient is φ = 20267520.

The previous prime is 28480429. The next prime is 28480469. The reversal of 28480465 is 56408482.

It can be written as a sum of positive squares in 12 ways, for example, as 13082689 + 15397776 = 3617^2 + 3924^2 .

It is not a de Polignac number, because 28480465 - 2¹³ = 28472273 is a prime.

It is a super-2 number, since 2×28480465² = 1622273773232450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28480469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54405 + ... + 54925.

It is an arithmetic number, because the mean of its divisors is an integer number (1591317).

Almost surely, 2^28480465 is an apocalyptic number.

It is an amenable number.

28480465 is a deficient number, since it is larger than the sum of its proper divisors (9711143).

28480465 is a wasteful number, since it uses less digits than its factorization.

28480465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597 (or 568 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 28480465 is about 5336.7091920021. The cubic root of 28480465 is about 305.3859308788.

The spelling of 28480465 in words is "twenty-eight million, four hundred eighty thousand, four hundred sixty-five".