28309020214 has 4 divisors (see below), whose sum is σ = 42463530324. Its totient is φ = 14154510106.

The previous prime is 28309020209. The next prime is 28309020263. The reversal of 28309020214 is 41202090382.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7077255052 + ... + 7077255055.

It is an arithmetic number, because the mean of its divisors is an integer number (10615882581).

Almost surely, 2^28309020214 is an apocalyptic number.

28309020214 is a deficient number, since it is larger than the sum of its proper divisors (14154510110).

28309020214 is a wasteful number, since it uses less digits than its factorization.

28309020214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14154510109.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 28309020214 in words is "twenty-eight billion, three hundred nine million, twenty thousand, two hundred fourteen".