28418773 has 4 divisors (see below), whose sum is σ = 28537920. Its totient is φ = 28299628.

The previous prime is 28418717. The next prime is 28418779. The reversal of 28418773 is 37781482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37781482 = 2 ⋅18890741.

It is a cyclic number.

It is not a de Polignac number, because 28418773 - 2²¹ = 26321621 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28418779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59215 + ... + 59692.

It is an arithmetic number, because the mean of its divisors is an integer number (7134480).

Almost surely, 2^28418773 is an apocalyptic number.

It is an amenable number.

28418773 is a deficient number, since it is larger than the sum of its proper divisors (119147).

28418773 is a wasteful number, since it uses less digits than its factorization.

28418773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119146.

The product of its digits is 75264, while the sum is 40.

The square root of 28418773 is about 5330.9260921532. The cubic root of 28418773 is about 305.1652709942.

The spelling of 28418773 in words is "twenty-eight million, four hundred eighteen thousand, seven hundred seventy-three".