28530406 has 8 divisors (see below), whose sum is σ = 42821280. Its totient is φ = 14256648.

The previous prime is 28530391. The next prime is 28530407. The reversal of 28530406 is 60403582.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28530407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1395 + ... + 7681.

It is an arithmetic number, because the mean of its divisors is an integer number (5352660).

Almost surely, 2^28530406 is an apocalyptic number.

28530406 is a deficient number, since it is larger than the sum of its proper divisors (14290874).

28530406 is a wasteful number, since it uses less digits than its factorization.

28530406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8558.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 28530406 is about 5341.3861496806. The cubic root of 28530406 is about 305.5643265263.

Adding to 28530406 its reverse (60403582), we get a palindrome (88933988).

The spelling of 28530406 in words is "twenty-eight million, five hundred thirty thousand, four hundred six".