28645818 has 16 divisors (see below), whose sum is σ = 57452160. Its totient is φ = 9521856.

The previous prime is 28645817. The next prime is 28645831. The reversal of 28645818 is 81854682.

It is a self number, because there is not a number n which added to its sum of digits gives 28645818.

It is not an unprimeable number, because it can be changed into a prime (28645817) 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, 4303 + ... + 8706.

It is an arithmetic number, because the mean of its divisors is an integer number (3590760).

Almost surely, 2^28645818 is an apocalyptic number.

28645818 is an abundant number, since it is smaller than the sum of its proper divisors (28806342).

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

28645818 is a wasteful number, since it uses less digits than its factorization.

28645818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13381.

The product of its digits is 122880, while the sum is 42.

The square root of 28645818 is about 5352.1788086722. The cubic root of 28645818 is about 305.9757979919.

The spelling of 28645818 in words is "twenty-eight million, six hundred forty-five thousand, eight hundred eighteen".