28446480 has 60 divisors (see below), whose sum is σ = 95535180. Its totient is φ = 7585536.

The previous prime is 28446461. The next prime is 28446487. The reversal of 28446480 is 8464482.

28446480 is a `hidden beast` number, since 2 + 8 + 4 + 4 + 648 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8088336 + 20358144 = 2844^2 + 4512^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28446487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19035 + ... + 20474.

It is an arithmetic number, because the mean of its divisors is an integer number (1592253).

Almost surely, 2^28446480 is an apocalyptic number.

28446480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28446480 is an abundant number, since it is smaller than the sum of its proper divisors (67088700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28446480 is a wasteful number, since it uses less digits than its factorization.

28446480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39528 (or 39519 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The square root of 28446480 is about 5333.5241632527. The cubic root of 28446480 is about 305.2644128284.

It can be divided in two parts, 284 and 46480, that added together give a palindrome (46764).

The spelling of 28446480 in words is "twenty-eight million, four hundred forty-six thousand, four hundred eighty".