28214387 has 8 divisors (see below), whose sum is σ = 29203152. Its totient is φ = 27237600.

The previous prime is 28214383. The next prime is 28214401. The reversal of 28214387 is 78341282.

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 28214387 - 2² = 28214383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28214383) 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, 1937 + ... + 7757.

It is an arithmetic number, because the mean of its divisors is an integer number (3650394).

Almost surely, 2^28214387 is an apocalyptic number.

28214387 is a deficient number, since it is larger than the sum of its proper divisors (988765).

28214387 is a wasteful number, since it uses less digits than its factorization.

28214387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5989.

The product of its digits is 21504, while the sum is 35.

The square root of 28214387 is about 5311.7216606294. The cubic root of 28214387 is about 304.4319337579.

The spelling of 28214387 in words is "twenty-eight million, two hundred fourteen thousand, three hundred eighty-seven".