28764433 has 8 divisors (see below), whose sum is σ = 29836800. Its totient is φ = 27697488.

The previous prime is 28764431. The next prime is 28764451. The reversal of 28764433 is 33446782.

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 28764433 - 2¹ = 28764431 is a prime.

It is a super-2 number, since 2×28764433² = 1654785211622978, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28764392 and 28764401.

It is not an unprimeable number, because it can be changed into a prime (28764431) 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, 11728 + ... + 13966.

It is an arithmetic number, because the mean of its divisors is an integer number (3729600).

Almost surely, 2^28764433 is an apocalyptic number.

It is an amenable number.

28764433 is a deficient number, since it is larger than the sum of its proper divisors (1072367).

28764433 is a wasteful number, since it uses less digits than its factorization.

28764433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2711.

The product of its digits is 96768, while the sum is 37.

The square root of 28764433 is about 5363.2483626996. The cubic root of 28764433 is about 306.3975389061.

The spelling of 28764433 in words is "twenty-eight million, seven hundred sixty-four thousand, four hundred thirty-three".