28017761 has 8 divisors (see below), whose sum is σ = 30049920. Its totient is φ = 26041392.

The previous prime is 28017739. The next prime is 28017763. The reversal of 28017761 is 16771082.

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 28017761 - 2⁶ = 28017697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28017763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12905 + ... + 14918.

It is an arithmetic number, because the mean of its divisors is an integer number (3756240).

Almost surely, 2^28017761 is an apocalyptic number.

It is an amenable number.

28017761 is a deficient number, since it is larger than the sum of its proper divisors (2032159).

28017761 is a wasteful number, since it uses less digits than its factorization.

28017761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27895.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 28017761 is about 5293.1806128263. The cubic root of 28017761 is about 303.7230893985.

The spelling of 28017761 in words is "twenty-eight million, seventeen thousand, seven hundred sixty-one".