28464013 has 4 divisors (see below), whose sum is σ = 28588540. Its totient is φ = 28339488.

The previous prime is 28464011. The next prime is 28464017. The reversal of 28464013 is 31046482.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20994724 + 7469289 = 4582^2 + 2733^2 .

It is a cyclic number.

It is not a de Polignac number, because 28464013 - 2¹ = 28464011 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 (28464011) 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 3 ways as a sum of consecutive naturals, for example, 61920 + ... + 62377.

It is an arithmetic number, because the mean of its divisors is an integer number (7147135).

Almost surely, 2^28464013 is an apocalyptic number.

It is an amenable number.

28464013 is a deficient number, since it is larger than the sum of its proper divisors (124527).

28464013 is a wasteful number, since it uses less digits than its factorization.

28464013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124526.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 28464013 is about 5335.1675700019. The cubic root of 28464013 is about 305.3271165644.

It can be divided in two parts, 2846 and 4013, that added together give a cube (6859 = 19³).

The spelling of 28464013 in words is "twenty-eight million, four hundred sixty-four thousand, thirteen".