28762261 has 8 divisors (see below), whose sum is σ = 32045184. Its totient is φ = 25590720.

The previous prime is 28762231. The next prime is 28762277. The reversal of 28762261 is 16226782.

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 28762261 - 2¹¹ = 28760213 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 (28762231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27300 + ... + 28333.

It is an arithmetic number, because the mean of its divisors is an integer number (4005648).

Almost surely, 2^28762261 is an apocalyptic number.

It is an amenable number.

28762261 is a deficient number, since it is larger than the sum of its proper divisors (3282923).

28762261 is a wasteful number, since it uses less digits than its factorization.

28762261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55691.

The product of its digits is 16128, while the sum is 34.

The square root of 28762261 is about 5363.0458696528. The cubic root of 28762261 is about 306.3898266942.

The spelling of 28762261 in words is "twenty-eight million, seven hundred sixty-two thousand, two hundred sixty-one".