28006430 has 8 divisors (see below), whose sum is σ = 50411592. Its totient is φ = 11202568.

The previous prime is 28006417. The next prime is 28006439. The reversal of 28006430 is 3460082.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28006396 and 28006405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28006439) 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 3 ways as a sum of consecutive naturals, for example, 1400312 + ... + 1400331.

It is an arithmetic number, because the mean of its divisors is an integer number (6301449).

Almost surely, 2^28006430 is an apocalyptic number.

28006430 is a deficient number, since it is larger than the sum of its proper divisors (22405162).

28006430 is a wasteful number, since it uses less digits than its factorization.

28006430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800650.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 28006430 is about 5292.1101651421. The cubic root of 28006430 is about 303.6821397741.

The spelling of 28006430 in words is "twenty-eight million, six thousand, four hundred thirty".