28447572 has 12 divisors (see below), whose sum is σ = 66377696. Its totient is φ = 9482520.

The previous prime is 28447571. The next prime is 28447577. The reversal of 28447572 is 27574482.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 28447572.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28447571) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1185304 + ... + 1185327.

Almost surely, 2^28447572 is an apocalyptic number.

It is an amenable number.

28447572 is an abundant number, since it is smaller than the sum of its proper divisors (37930124).

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

28447572 is a wasteful number, since it uses less digits than its factorization.

28447572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370638 (or 2370636 counting only the distinct ones).

The product of its digits is 125440, while the sum is 39.

The square root of 28447572 is about 5333.6265336073. The cubic root of 28447572 is about 305.2683189294.

The spelling of 28447572 in words is "twenty-eight million, four hundred forty-seven thousand, five hundred seventy-two".