28546913 has 4 divisors (see below), whose sum is σ = 29085588. Its totient is φ = 28008240.

The previous prime is 28546901. The next prime is 28546919. The reversal of 28546913 is 31964582.

It is a happy number.

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 23493409 + 5053504 = 4847^2 + 2248^2 .

It is a cyclic number.

It is not a de Polignac number, because 28546913 - 2¹⁸ = 28284769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28546919) 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, 269258 + ... + 269363.

It is an arithmetic number, because the mean of its divisors is an integer number (7271397).

Almost surely, 2^28546913 is an apocalyptic number.

It is an amenable number.

28546913 is a deficient number, since it is larger than the sum of its proper divisors (538675).

28546913 is an equidigital number, since it uses as much as digits as its factorization.

28546913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538674.

The product of its digits is 51840, while the sum is 38.

The square root of 28546913 is about 5342.9311243923. The cubic root of 28546913 is about 305.6232458641.

The spelling of 28546913 in words is "twenty-eight million, five hundred forty-six thousand, nine hundred thirteen".