28944693 has 24 divisors (see below), whose sum is σ = 45473688. Its totient is φ = 17667072.

The previous prime is 28944691. The next prime is 28944701. The reversal of 28944693 is 39644982.

It can be written as a sum of positive squares in 4 ways, for example, as 4915089 + 24029604 = 2217^2 + 4902^2 .

It is not a de Polignac number, because 28944693 - 2¹ = 28944691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28944691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3105 + ... + 8217.

It is an arithmetic number, because the mean of its divisors is an integer number (1894737).

Almost surely, 2^28944693 is an apocalyptic number.

It is an amenable number.

28944693 is a deficient number, since it is larger than the sum of its proper divisors (16528995).

28944693 is a wasteful number, since it uses less digits than its factorization.

28944693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5173 (or 5170 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 28944693 is about 5380.0272304144. The cubic root of 28944693 is about 307.0362472100.

The spelling of 28944693 in words is "twenty-eight million, nine hundred forty-four thousand, six hundred ninety-three".