28912214 has 4 divisors (see below), whose sum is σ = 43368324. Its totient is φ = 14456106.

The previous prime is 28912193. The next prime is 28912249. The reversal of 28912214 is 41221982.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×28912214² = 1671832236763592, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 7228052 + ... + 7228055.

It is an arithmetic number, because the mean of its divisors is an integer number (10842081).

Almost surely, 2^28912214 is an apocalyptic number.

28912214 is a deficient number, since it is larger than the sum of its proper divisors (14456110).

28912214 is a wasteful number, since it uses less digits than its factorization.

28912214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14456109.

The product of its digits is 2304, while the sum is 29.

The square root of 28912214 is about 5377.0079040299. The cubic root of 28912214 is about 306.9213618714.

The spelling of 28912214 in words is "twenty-eight million, nine hundred twelve thousand, two hundred fourteen".