28756633 has 8 divisors (see below), whose sum is σ = 30697920. Its totient is φ = 26858160.

The previous prime is 28756631. The next prime is 28756657. The reversal of 28756633 is 33665782.

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 28756633 - 2¹ = 28756631 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28756631) 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, 9310 + ... + 12007.

It is an arithmetic number, because the mean of its divisors is an integer number (3837240).

Almost surely, 2^28756633 is an apocalyptic number.

It is an amenable number.

28756633 is a deficient number, since it is larger than the sum of its proper divisors (1941287).

28756633 is a wasteful number, since it uses less digits than its factorization.

28756633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21407.

The product of its digits is 181440, while the sum is 40.

The square root of 28756633 is about 5362.5211421495. The cubic root of 28756633 is about 306.3698413110.

The spelling of 28756633 in words is "twenty-eight million, seven hundred fifty-six thousand, six hundred thirty-three".