28684461 has 16 divisors (see below), whose sum is σ = 42194880. Its totient is φ = 17220480.

The previous prime is 28684417. The next prime is 28684511. The reversal of 28684461 is 16448682.

It is not a de Polignac number, because 28684461 - 2⁷ = 28684333 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28684261) 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, 7371 + ... + 10568.

It is an arithmetic number, because the mean of its divisors is an integer number (2637180).

Almost surely, 2^28684461 is an apocalyptic number.

It is an amenable number.

28684461 is a deficient number, since it is larger than the sum of its proper divisors (13510419).

28684461 is a wasteful number, since it uses less digits than its factorization.

28684461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17996.

The product of its digits is 73728, while the sum is 39.

The square root of 28684461 is about 5355.7876171484. The cubic root of 28684461 is about 306.1133225454.

The spelling of 28684461 in words is "twenty-eight million, six hundred eighty-four thousand, four hundred sixty-one".