28215061 has 8 divisors (see below), whose sum is σ = 32279360. Its totient is φ = 24159168.

The previous prime is 28215059. The next prime is 28215067. The reversal of 28215061 is 16051282.

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 28215061 - 2¹ = 28215059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28215067) 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 7 ways as a sum of consecutive naturals, for example, 9070 + ... + 11776.

It is an arithmetic number, because the mean of its divisors is an integer number (4034920).

Almost surely, 2^28215061 is an apocalyptic number.

It is an amenable number.

28215061 is a deficient number, since it is larger than the sum of its proper divisors (4064299).

28215061 is a wasteful number, since it uses less digits than its factorization.

28215061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4203.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 28215061 is about 5311.7851048400. The cubic root of 28215061 is about 304.4343578816.

The spelling of 28215061 in words is "twenty-eight million, two hundred fifteen thousand, sixty-one".