28947318 has 16 divisors (see below), whose sum is σ = 58000320. Its totient is φ = 9631496.

The previous prime is 28947313. The next prime is 28947319. The reversal of 28947318 is 81374982.

It is a self number, because there is not a number n which added to its sum of digits gives 28947318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28947313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588 + ... + 7631.

It is an arithmetic number, because the mean of its divisors is an integer number (3625020).

Almost surely, 2^28947318 is an apocalyptic number.

28947318 is an abundant number, since it is smaller than the sum of its proper divisors (29053002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28947318 is a wasteful number, since it uses less digits than its factorization.

28947318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8811.

The product of its digits is 96768, while the sum is 42.

The square root of 28947318 is about 5380.2711827565. The cubic root of 28947318 is about 307.0455286557.

The spelling of 28947318 in words is "twenty-eight million, nine hundred forty-seven thousand, three hundred eighteen".