28994544 has 80 divisors (see below), whose sum is σ = 85307040. Its totient is φ = 9423360.

The previous prime is 28994531. The next prime is 28994549. The reversal of 28994544 is 44549982.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 28994544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28994549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16894 + ... + 18530.

It is an arithmetic number, because the mean of its divisors is an integer number (1066338).

Almost surely, 2^28994544 is an apocalyptic number.

28994544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28994544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42653520).

28994544 is an abundant number, since it is smaller than the sum of its proper divisors (56312496).

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

28994544 is a wasteful number, since it uses less digits than its factorization.

28994544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695 (or 1683 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 28994544 is about 5384.6582064231. The cubic root of 28994544 is about 307.2124140491.

The spelling of 28994544 in words is "twenty-eight million, nine hundred ninety-four thousand, five hundred forty-four".