305864493 has 16 divisors (see below), whose sum is σ = 471064896. Its totient is φ = 174467840.

The previous prime is 305864491. The next prime is 305864497. The reversal of 305864493 is 394468503.

It is a cyclic number.

It is not a de Polignac number, because 305864493 - 2¹ = 305864491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305864491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272046 + ... + 273167.

It is an arithmetic number, because the mean of its divisors is an integer number (29441556).

Almost surely, 2^305864493 is an apocalyptic number.

305864493 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

305864493 is a deficient number, since it is larger than the sum of its proper divisors (165200403).

305864493 is a wasteful number, since it uses less digits than its factorization.

305864493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545244.

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 305864493 is about 17488.9820458482. The cubic root of 305864493 is about 673.7669252245.

The spelling of 305864493 in words is "three hundred five million, eight hundred sixty-four thousand, four hundred ninety-three".