28906018 has 8 divisors (see below), whose sum is σ = 45909612. Its totient is φ = 13602816.

The previous prime is 28906013. The next prime is 28906027. The reversal of 28906018 is 81060982.

It can be written as a sum of positive squares in 2 ways, for example, as 22439169 + 6466849 = 4737^2 + 2543^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 850177 = 28906018 / (2 + 8 + 9 + 0 + 6 + 0 + 1 + 8).

It is not an unprimeable number, because it can be changed into a prime (28906013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425055 + ... + 425122.

Almost surely, 2^28906018 is an apocalyptic number.

28906018 is a deficient number, since it is larger than the sum of its proper divisors (17003594).

28906018 is a wasteful number, since it uses less digits than its factorization.

28906018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850196.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 28906018 is about 5376.4317162966. The cubic root of 28906018 is about 306.8994354909.

The spelling of 28906018 in words is "twenty-eight million, nine hundred six thousand, eighteen".