28654389 has 12 divisors (see below), whose sum is σ = 43189536. Its totient is φ = 18272232.

The previous prime is 28654331. The next prime is 28654399. The reversal of 28654389 is 98345682.

28654389 is a `hidden beast` number, since 28 + 6 + 543 + 89 = 666.

It is not a de Polignac number, because 28654389 - 2⁸ = 28654133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28654309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69007 + ... + 69420.

It is an arithmetic number, because the mean of its divisors is an integer number (3599128).

Almost surely, 2^28654389 is an apocalyptic number.

It is an amenable number.

28654389 is a deficient number, since it is larger than the sum of its proper divisors (14535147).

28654389 is a wasteful number, since it uses less digits than its factorization.

28654389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138456 (or 138453 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 28654389 is about 5352.9794507358. The cubic root of 28654389 is about 306.0063115448.

The spelling of 28654389 in words is "twenty-eight million, six hundred fifty-four thousand, three hundred eighty-nine".