28242818 has 8 divisors (see below), whose sum is σ = 42394620. Its totient is φ = 14111280.

The previous prime is 28242791. The next prime is 28242859. The reversal of 28242818 is 81824282.

It can be written as a sum of positive squares in 2 ways, for example, as 27112849 + 1129969 = 5207^2 + 1063^2 .

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

It is a super-2 number, since 2×28242818² = 1595313537162248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 893 + ... + 7568.

Almost surely, 2^28242818 is an apocalyptic number.

28242818 is a deficient number, since it is larger than the sum of its proper divisors (14151802).

28242818 is a wasteful number, since it uses less digits than its factorization.

28242818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10132.

The product of its digits is 16384, while the sum is 35.

The square root of 28242818 is about 5314.3972376931. The cubic root of 28242818 is about 304.5341558227.

The spelling of 28242818 in words is "twenty-eight million, two hundred forty-two thousand, eight hundred eighteen".