28074013 has 4 divisors (see below), whose sum is σ = 30626208. Its totient is φ = 25521820.

The previous prime is 28073999. The next prime is 28074017. The reversal of 28074013 is 31047082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28074013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28074017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276081 + ... + 1276102.

It is an arithmetic number, because the mean of its divisors is an integer number (7656552).

Almost surely, 2^28074013 is an apocalyptic number.

It is an amenable number.

28074013 is a deficient number, since it is larger than the sum of its proper divisors (2552195).

28074013 is a wasteful number, since it uses less digits than its factorization.

28074013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552194.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 28074013 is about 5298.4915777983. The cubic root of 28074013 is about 303.9262178109.

The spelling of 28074013 in words is "twenty-eight million, seventy-four thousand, thirteen".