28944542 has 8 divisors (see below), whose sum is σ = 47363832. Its totient is φ = 13156600.

The previous prime is 28944541. The next prime is 28944551. The reversal of 28944542 is 24544982.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28944496 and 28944505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28944541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 657809 + ... + 657852.

It is an arithmetic number, because the mean of its divisors is an integer number (5920479).

Almost surely, 2^28944542 is an apocalyptic number.

28944542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28944542 is a deficient number, since it is larger than the sum of its proper divisors (18419290).

28944542 is a wasteful number, since it uses less digits than its factorization.

28944542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315674.

The product of its digits is 92160, while the sum is 38.

The square root of 28944542 is about 5380.0131970098. The cubic root of 28944542 is about 307.0357132888.

The spelling of 28944542 in words is "twenty-eight million, nine hundred forty-four thousand, five hundred forty-two".