28841215 has 8 divisors (see below), whose sum is σ = 37271808. Its totient is φ = 21298080.

The previous prime is 28841209. The next prime is 28841233. The reversal of 28841215 is 51214882.

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

It is not a de Polignac number, because 28841215 - 2¹³ = 28833023 is a prime.

It is a super-3 number, since 3×28841215³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

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, 221791 + ... + 221920.

It is an arithmetic number, because the mean of its divisors is an integer number (4658976).

Almost surely, 2^28841215 is an apocalyptic number.

28841215 is a deficient number, since it is larger than the sum of its proper divisors (8430593).

28841215 is a wasteful number, since it uses less digits than its factorization.

28841215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443729.

The product of its digits is 5120, while the sum is 31.

The square root of 28841215 is about 5370.4017540590. The cubic root of 28841215 is about 306.6699229070.

The spelling of 28841215 in words is "twenty-eight million, eight hundred forty-one thousand, two hundred fifteen".