28944435 has 32 divisors (see below), whose sum is σ = 50254848. Its totient is φ = 14140800.

The previous prime is 28944371. The next prime is 28944437. The reversal of 28944435 is 53444982.

It is not a de Polignac number, because 28944435 - 2⁶ = 28944371 is a prime.

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

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

It is a junction number, because it is equal to n+sod(n) for n = 28944393 and 28944402.

It is not an unprimeable number, because it can be changed into a prime (28944437) 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 31 ways as a sum of consecutive naturals, for example, 28954 + ... + 29936.

It is an arithmetic number, because the mean of its divisors is an integer number (1570464).

Almost surely, 2^28944435 is an apocalyptic number.

28944435 is a deficient number, since it is larger than the sum of its proper divisors (21310413).

28944435 is a wasteful number, since it uses less digits than its factorization.

28944435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155.

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

The square root of 28944435 is about 5380.0032527871. The cubic root of 28944435 is about 307.0353349462.

The spelling of 28944435 in words is "twenty-eight million, nine hundred forty-four thousand, four hundred thirty-five".