28333861 has 8 divisors (see below), whose sum is σ = 30254400. Its totient is φ = 26470752.

The previous prime is 28333843. The next prime is 28333871. The reversal of 28333861 is 16833382.

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 28333861 - 2¹³ = 28325669 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 (28333871) 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, 13336 + ... + 15313.

It is an arithmetic number, because the mean of its divisors is an integer number (3781800).

Almost surely, 2^28333861 is an apocalyptic number.

It is an amenable number.

28333861 is a deficient number, since it is larger than the sum of its proper divisors (1920539).

28333861 is a wasteful number, since it uses less digits than its factorization.

28333861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28715.

The product of its digits is 20736, while the sum is 34.

The square root of 28333861 is about 5322.9560396456. The cubic root of 28333861 is about 304.8610349650.

The spelling of 28333861 in words is "twenty-eight million, three hundred thirty-three thousand, eight hundred sixty-one".