28464418 has 4 divisors (see below), whose sum is σ = 42696630. Its totient is φ = 14232208.

The previous prime is 28464377. The next prime is 28464419. The reversal of 28464418 is 81446482.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14722569 + 13741849 = 3837^2 + 3707^2 .

It is not an unprimeable number, because it can be changed into a prime (28464419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7116103 + ... + 7116106.

Almost surely, 2^28464418 is an apocalyptic number.

28464418 is a deficient number, since it is larger than the sum of its proper divisors (14232212).

28464418 is a wasteful number, since it uses less digits than its factorization.

28464418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14232211.

The product of its digits is 49152, while the sum is 37.

The square root of 28464418 is about 5335.2055255632. The cubic root of 28464418 is about 305.3285646724.

It can be divided in two parts, 28464 and 418, that added together give a palindrome (28882).

The spelling of 28464418 in words is "twenty-eight million, four hundred sixty-four thousand, four hundred eighteen".