28145318 has 4 divisors (see below), whose sum is σ = 42217980. Its totient is φ = 14072658.

The previous prime is 28145309. The next prime is 28145321. The reversal of 28145318 is 81354182.

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

It is a super-2 number, since 2×28145318² = 1584317850642248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7036328 + ... + 7036331.

It is an arithmetic number, because the mean of its divisors is an integer number (10554495).

Almost surely, 2^28145318 is an apocalyptic number.

28145318 is a deficient number, since it is larger than the sum of its proper divisors (14072662).

28145318 is a wasteful number, since it uses less digits than its factorization.

28145318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14072661.

The product of its digits is 7680, while the sum is 32.

The square root of 28145318 is about 5305.2161124689. The cubic root of 28145318 is about 304.1833136653.

The spelling of 28145318 in words is "twenty-eight million, one hundred forty-five thousand, three hundred eighteen".