28944011 has 4 divisors (see below), whose sum is σ = 30467400. Its totient is φ = 27420624.

The previous prime is 28943983. The next prime is 28944023. The reversal of 28944011 is 11044982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28944011 - 2⁶ = 28943947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28944211) 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, 761666 + ... + 761703.

It is an arithmetic number, because the mean of its divisors is an integer number (7616850).

Almost surely, 2^28944011 is an apocalyptic number.

28944011 is a deficient number, since it is larger than the sum of its proper divisors (1523389).

28944011 is a wasteful number, since it uses less digits than its factorization.

28944011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523388.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 28944011 is about 5379.9638474622. The cubic root of 28944011 is about 307.0338357102.

Adding to 28944011 its reverse (11044982), we get a palindrome (39988993).

The spelling of 28944011 in words is "twenty-eight million, nine hundred forty-four thousand, eleven".