28476013 has 4 divisors (see below), whose sum is σ = 28512540. Its totient is φ = 28439488.

The previous prime is 28475983. The next prime is 28476023. The reversal of 28476013 is 31067482.

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 5031049 + 23444964 = 2243^2 + 4842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28476013 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28476023) 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, 17068 + ... + 18661.

It is an arithmetic number, because the mean of its divisors is an integer number (7128135).

Almost surely, 2^28476013 is an apocalyptic number.

It is an amenable number.

28476013 is a deficient number, since it is larger than the sum of its proper divisors (36527).

28476013 is an equidigital number, since it uses as much as digits as its factorization.

28476013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36526.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 28476013 is about 5336.2920647206. The cubic root of 28476013 is about 305.3700176436.

The spelling of 28476013 in words is "twenty-eight million, four hundred seventy-six thousand, thirteen".