285457073 has 4 divisors (see below), whose sum is σ = 311407728. Its totient is φ = 259506420.

The previous prime is 285457057. The next prime is 285457079. The reversal of 285457073 is 370754582.

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.

It is a cyclic number.

It is not a de Polignac number, because 285457073 - 2⁴ = 285457057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 285457073.

It is not an unprimeable number, because it can be changed into a prime (285457079) 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, 12975311 + ... + 12975332.

It is an arithmetic number, because the mean of its divisors is an integer number (77851932).

Almost surely, 2^285457073 is an apocalyptic number.

It is an amenable number.

285457073 is a deficient number, since it is larger than the sum of its proper divisors (25950655).

285457073 is a wasteful number, since it uses less digits than its factorization.

285457073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25950654.

The product of its (nonzero) digits is 235200, while the sum is 41.

The square root of 285457073 is about 16895.4749267370. The cubic root of 285457073 is about 658.4360528640.

The spelling of 285457073 in words is "two hundred eighty-five million, four hundred fifty-seven thousand, seventy-three".