28870411 has 4 divisors (see below), whose sum is σ = 29359800. Its totient is φ = 28381024.

The previous prime is 28870409. The next prime is 28870423. The reversal of 28870411 is 11407882.

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

It is a cyclic number.

It is not a de Polignac number, because 28870411 - 2¹ = 28870409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28870111) 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, 244606 + ... + 244723.

It is an arithmetic number, because the mean of its divisors is an integer number (7339950).

Almost surely, 2^28870411 is an apocalyptic number.

28870411 is a deficient number, since it is larger than the sum of its proper divisors (489389).

28870411 is an equidigital number, since it uses as much as digits as its factorization.

28870411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489388.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 28870411 is about 5373.1192988803. The cubic root of 28870411 is about 306.7733687979.

The spelling of 28870411 in words is "twenty-eight million, eight hundred seventy thousand, four hundred eleven".