28196515 has 8 divisors (see below), whose sum is σ = 34927488. Its totient is φ = 21829440.

The previous prime is 28196471. The next prime is 28196521. The reversal of 28196515 is 51569182.

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

It is not a de Polignac number, because 28196515 - 2²¹ = 26099363 is a prime.

It is a Duffinian 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, 90802 + ... + 91111.

It is an arithmetic number, because the mean of its divisors is an integer number (4365936).

Almost surely, 2^28196515 is an apocalyptic number.

28196515 is a deficient number, since it is larger than the sum of its proper divisors (6730973).

28196515 is a wasteful number, since it uses less digits than its factorization.

28196515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181949.

The product of its digits is 21600, while the sum is 37.

The square root of 28196515 is about 5310.0390770690. The cubic root of 28196515 is about 304.3676408291.

The spelling of 28196515 in words is "twenty-eight million, one hundred ninety-six thousand, five hundred fifteen".