28943544 has 32 divisors (see below), whose sum is σ = 82696320. Its totient is φ = 8269536.

The previous prime is 28943543. The next prime is 28943557. The reversal of 28943544 is 44534982.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28943543) 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 7 ways as a sum of consecutive naturals, for example, 85974 + ... + 86309.

It is an arithmetic number, because the mean of its divisors is an integer number (2584260).

Almost surely, 2^28943544 is an apocalyptic number.

28943544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28943544 is an abundant number, since it is smaller than the sum of its proper divisors (53752776).

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

28943544 is a wasteful number, since it uses less digits than its factorization.

28943544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172299 (or 172295 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 28943544 is about 5379.9204455085. The cubic root of 28943544 is about 307.0321844121.

The spelling of 28943544 in words is "twenty-eight million, nine hundred forty-three thousand, five hundred forty-four".