28032015 has 16 divisors (see below), whose sum is σ = 48928896. Its totient is φ = 13591200.

The previous prime is 28031989. The next prime is 28032019. The reversal of 28032015 is 51023082.

It is not a de Polignac number, because 28032015 - 2¹² = 28027919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28031982 and 28032000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28032019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84781 + ... + 85110.

It is an arithmetic number, because the mean of its divisors is an integer number (3058056).

Almost surely, 2^28032015 is an apocalyptic number.

28032015 is a deficient number, since it is larger than the sum of its proper divisors (20896881).

28032015 is a wasteful number, since it uses less digits than its factorization.

28032015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169910.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 28032015 is about 5294.5268910451. The cubic root of 28032015 is about 303.7745869105.

Adding to 28032015 its reverse (51023082), we get a palindrome (79055097).

The spelling of 28032015 in words is "twenty-eight million, thirty-two thousand, fifteen".