28064544 has 48 divisors (see below), whose sum is σ = 74001312. Its totient is φ = 9312768.

The previous prime is 28064521. The next prime is 28064563. The reversal of 28064544 is 44546082.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

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 7 ways as a sum of consecutive naturals, for example, 26652 + ... + 27684.

It is an arithmetic number, because the mean of its divisors is an integer number (1541694).

Almost surely, 2^28064544 is an apocalyptic number.

28064544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28064544 is an abundant number, since it is smaller than the sum of its proper divisors (45936768).

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

28064544 is a wasteful number, since it uses less digits than its factorization.

28064544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329 (or 1321 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 28064544 is about 5297.5979462394. The cubic root of 28064544 is about 303.8920438464.

The spelling of 28064544 in words is "twenty-eight million, sixty-four thousand, five hundred forty-four".