28212386 has 8 divisors (see below), whose sum is σ = 43302864. Its totient is φ = 13778100.

The previous prime is 28212341. The next prime is 28212403. The reversal of 28212386 is 68321282.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163940 + ... + 164111.

It is an arithmetic number, because the mean of its divisors is an integer number (5412858).

Almost surely, 2^28212386 is an apocalyptic number.

28212386 is a deficient number, since it is larger than the sum of its proper divisors (15090478).

28212386 is a wasteful number, since it uses less digits than its factorization.

28212386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328096.

The product of its digits is 9216, while the sum is 32.

The square root of 28212386 is about 5311.5333002816. The cubic root of 28212386 is about 304.4247366886.

The spelling of 28212386 in words is "twenty-eight million, two hundred twelve thousand, three hundred eighty-six".