28418516 has 24 divisors (see below), whose sum is σ = 58375296. Its totient is φ = 11849760.

The previous prime is 28418513. The next prime is 28418569. The reversal of 28418516 is 61581482.

It is a super-2 number, since 2×28418516² = 1615224103284512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28418513) 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, 12680 + ... + 14751.

It is an arithmetic number, because the mean of its divisors is an integer number (2432304).

Almost surely, 2^28418516 is an apocalyptic number.

It is an amenable number.

28418516 is an abundant number, since it is smaller than the sum of its proper divisors (29956780).

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

28418516 is a wasteful number, since it uses less digits than its factorization.

28418516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27479 (or 27477 counting only the distinct ones).

The product of its digits is 15360, while the sum is 35.

The square root of 28418516 is about 5330.9019874689. The cubic root of 28418516 is about 305.1643510893.

Adding to 28418516 its reverse (61581482), we get a palindrome (89999998).

The spelling of 28418516 in words is "twenty-eight million, four hundred eighteen thousand, five hundred sixteen".