285153649 has 4 divisors (see below), whose sum is σ = 311076720. Its totient is φ = 259230580.

The previous prime is 285153643. The next prime is 285153677. The reversal of 285153649 is 946351582.

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 285153649 - 2⁹ = 285153137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285153643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12961519 + ... + 12961540.

It is an arithmetic number, because the mean of its divisors is an integer number (77769180).

Almost surely, 2^285153649 is an apocalyptic number.

It is an amenable number.

285153649 is a deficient number, since it is larger than the sum of its proper divisors (25923071).

285153649 is a wasteful number, since it uses less digits than its factorization.

285153649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25923070.

The product of its digits is 259200, while the sum is 43.

The square root of 285153649 is about 16886.4930935941. The cubic root of 285153649 is about 658.2026772846.

The spelling of 285153649 in words is "two hundred eighty-five million, one hundred fifty-three thousand, six hundred forty-nine".