28547387 has 8 divisors (see below), whose sum is σ = 31984752. Its totient is φ = 25250400.

The previous prime is 28547381. The next prime is 28547413. The reversal of 28547387 is 78374582.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28547387 - 2⁴ = 28547371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28547381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34664 + ... + 35477.

It is an arithmetic number, because the mean of its divisors is an integer number (3998094).

Almost surely, 2^28547387 is an apocalyptic number.

28547387 is a deficient number, since it is larger than the sum of its proper divisors (3437365).

28547387 is a wasteful number, since it uses less digits than its factorization.

28547387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70189.

The product of its digits is 376320, while the sum is 44.

The square root of 28547387 is about 5342.9754818827. The cubic root of 28547387 is about 305.6249374027.

The spelling of 28547387 in words is "twenty-eight million, five hundred forty-seven thousand, three hundred eighty-seven".