28547861 has 16 divisors (see below), whose sum is σ = 31363200. Its totient is φ = 25881408.

The previous prime is 28547839. The next prime is 28547903. The reversal of 28547861 is 16874582.

It is a cyclic number.

It is not a de Polignac number, because 28547861 - 2⁶ = 28547797 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 (28547801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108416 + ... + 108678.

It is an arithmetic number, because the mean of its divisors is an integer number (1960200).

Almost surely, 2^28547861 is an apocalyptic number.

It is an amenable number.

28547861 is a deficient number, since it is larger than the sum of its proper divisors (2815339).

28547861 is a wasteful number, since it uses less digits than its factorization.

28547861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508.

The product of its digits is 107520, while the sum is 41.

The square root of 28547861 is about 5343.0198390049. The cubic root of 28547861 is about 305.6266289226.

The spelling of 28547861 in words is "twenty-eight million, five hundred forty-seven thousand, eight hundred sixty-one".