28488618 has 32 divisors (see below), whose sum is σ = 64785600. Its totient is φ = 9274608.

The previous prime is 28488611. The next prime is 28488637. The reversal of 28488618 is 81688482.

It is a happy number.

28488618 is a `hidden beast` number, since 28 + 4 + 8 + 8 + 618 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28488611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3813 + ... + 8456.

It is an arithmetic number, because the mean of its divisors is an integer number (2024550).

Almost surely, 2^28488618 is an apocalyptic number.

28488618 is an abundant number, since it is smaller than the sum of its proper divisors (36296982).

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

28488618 is a wasteful number, since it uses less digits than its factorization.

28488618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12323 (or 12317 counting only the distinct ones).

The product of its digits is 196608, while the sum is 45.

The square root of 28488618 is about 5337.4729975898. The cubic root of 28488618 is about 305.4150686749.

The spelling of 28488618 in words is "twenty-eight million, four hundred eighty-eight thousand, six hundred eighteen".