28118430 has 24 divisors (see below), whose sum is σ = 73108152. Its totient is φ = 7498224.

The previous prime is 28118411. The next prime is 28118471. The reversal of 28118430 is 3481182.

It is a super-2 number, since 2×28118430² = 1581292211329800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28118394 and 28118403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156124 + ... + 156303.

It is an arithmetic number, because the mean of its divisors is an integer number (3046173).

Almost surely, 2^28118430 is an apocalyptic number.

28118430 is an abundant number, since it is smaller than the sum of its proper divisors (44989722).

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

28118430 is a wasteful number, since it uses less digits than its factorization.

28118430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312440 (or 312437 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 28118430 is about 5302.6813971801. The cubic root of 28118430 is about 304.0864178948.

The spelling of 28118430 in words is "twenty-eight million, one hundred eighteen thousand, four hundred thirty".