28400118 has 8 divisors (see below), whose sum is σ = 56800248. Its totient is φ = 9466704.

The previous prime is 28400107. The next prime is 28400129. The reversal of 28400118 is 81100482.

It is an interprime number because it is at equal distance from previous prime (28400107) and next prime (28400129).

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

28400118 is an admirable number.

It is a congruent number.

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, 2366671 + ... + 2366682.

It is an arithmetic number, because the mean of its divisors is an integer number (7100031).

Almost surely, 2^28400118 is an apocalyptic number.

28400118 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28400118 is a wasteful number, since it uses less digits than its factorization.

28400118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4733358.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 28400118 is about 5329.1761089309. The cubic root of 28400118 is about 305.0984829331.

The spelling of 28400118 in words is "twenty-eight million, four hundred thousand, one hundred eighteen".