28070015 has 8 divisors (see below), whose sum is σ = 33747840. Its totient is φ = 22413472.

The previous prime is 28069997. The next prime is 28070047. The reversal of 28070015 is 51007082.

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 28070015 - 2⁸ = 28069759 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2255 + ... + 7824.

It is an arithmetic number, because the mean of its divisors is an integer number (4218480).

Almost surely, 2^28070015 is an apocalyptic number.

28070015 is a deficient number, since it is larger than the sum of its proper divisors (5677825).

28070015 is a wasteful number, since it uses less digits than its factorization.

28070015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10641.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 28070015 is about 5298.1142871780. The cubic root of 28070015 is about 303.9117898213.

Adding to 28070015 its reverse (51007082), we get a palindrome (79077097).

The spelling of 28070015 in words is "twenty-eight million, seventy thousand, fifteen".