28771572 has 12 divisors (see below), whose sum is σ = 67133696. Its totient is φ = 9590520.

The previous prime is 28771559. The next prime is 28771573. The reversal of 28771572 is 27517782.

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 28771572.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28771573) 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 3 ways as a sum of consecutive naturals, for example, 1198804 + ... + 1198827.

Almost surely, 2^28771572 is an apocalyptic number.

It is an amenable number.

28771572 is an abundant number, since it is smaller than the sum of its proper divisors (38362124).

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

28771572 is a wasteful number, since it uses less digits than its factorization.

28771572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2397638 (or 2397636 counting only the distinct ones).

The product of its digits is 54880, while the sum is 39.

The square root of 28771572 is about 5363.9138695546. The cubic root of 28771572 is about 306.4228849193.

The spelling of 28771572 in words is "twenty-eight million, seven hundred seventy-one thousand, five hundred seventy-two".