28418313 has 32 divisors (see below), whose sum is σ = 48356352. Its totient is φ = 14414400.

The previous prime is 28418303. The next prime is 28418329. The reversal of 28418313 is 31381482.

It is not a de Polignac number, because 28418313 - 2¹⁰ = 28417289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28418303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8503 + ... + 11363.

It is an arithmetic number, because the mean of its divisors is an integer number (1511136).

Almost surely, 2^28418313 is an apocalyptic number.

It is an amenable number.

28418313 is a deficient number, since it is larger than the sum of its proper divisors (19938039).

28418313 is a wasteful number, since it uses less digits than its factorization.

28418313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2925.

The product of its digits is 4608, while the sum is 30.

The square root of 28418313 is about 5330.8829475050. The cubic root of 28418313 is about 305.1636244678.

Adding to 28418313 its reverse (31381482), we get a palindrome (59799795).

The spelling of 28418313 in words is "twenty-eight million, four hundred eighteen thousand, three hundred thirteen".