28944552 has 128 divisors (see below), whose sum is σ = 92332800. Its totient is φ = 7354368.

The previous prime is 28944551. The next prime is 28944571. The reversal of 28944552 is 25544982.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 28944552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28944551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63108 + ... + 63564.

It is an arithmetic number, because the mean of its divisors is an integer number (721350).

Almost surely, 2^28944552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28944552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46166400).

28944552 is an abundant number, since it is smaller than the sum of its proper divisors (63388248).

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

28944552 is a wasteful number, since it uses less digits than its factorization.

28944552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 511 counting only the distinct ones).

The product of its digits is 115200, while the sum is 39.

The square root of 28944552 is about 5380.0141263755. The cubic root of 28944552 is about 307.0357486479.

The spelling of 28944552 in words is "twenty-eight million, nine hundred forty-four thousand, five hundred fifty-two".