28914215 has 8 divisors (see below), whose sum is σ = 37851408. Its totient is φ = 21028480.

The previous prime is 28914199. The next prime is 28914233. The reversal of 28914215 is 51241982.

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

It is not a de Polignac number, because 28914215 - 2⁴ = 28914199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 262802 + ... + 262911.

It is an arithmetic number, because the mean of its divisors is an integer number (4731426).

Almost surely, 2^28914215 is an apocalyptic number.

28914215 is a deficient number, since it is larger than the sum of its proper divisors (8937193).

28914215 is a wasteful number, since it uses less digits than its factorization.

28914215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525729.

The product of its digits is 5760, while the sum is 32.

The square root of 28914215 is about 5377.1939708365. The cubic root of 28914215 is about 306.9284423332.

The spelling of 28914215 in words is "twenty-eight million, nine hundred fourteen thousand, two hundred fifteen".