28404733 has 8 divisors (see below), whose sum is σ = 32497920. Its totient is φ = 24320400.

The previous prime is 28404731. The next prime is 28404743. The reversal of 28404733 is 33740482.

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 28404733 - 2¹ = 28404731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28404695 and 28404704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28404731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7548 + ... + 10666.

It is an arithmetic number, because the mean of its divisors is an integer number (4062240).

Almost surely, 2^28404733 is an apocalyptic number.

It is an amenable number.

28404733 is a deficient number, since it is larger than the sum of its proper divisors (4093187).

28404733 is a wasteful number, since it uses less digits than its factorization.

28404733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4427.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 28404733 is about 5329.6090851018. The cubic root of 28404733 is about 305.1150081372.

The spelling of 28404733 in words is "twenty-eight million, four hundred four thousand, seven hundred thirty-three".