285643801 has 3 divisors (see below), whose sum is σ = 285660703. Its totient is φ = 285626900.

The previous prime is 285643783. The next prime is 285643849. The reversal of 285643801 is 108346582.

It is a happy number.

The square root of 285643801 is 16901.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 285576201 + 67600 = 16899^2 + 260^2 .

It is not a de Polignac number, because 285643801 - 2⁹ = 285643289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285640801) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 8451 + ... + 25351.

Almost surely, 2^285643801 is an apocalyptic number.

285643801 is the 16901-st square number.

285643801 is the 8451-st centered octagonal number.

It is an amenable number.

285643801 is a deficient number, since it is larger than the sum of its proper divisors (16902).

285643801 is an frugal number, since it uses more digits than its factorization.

285643801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33802 (or 16901 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The cubic root of 285643801 is about 658.5795906732.

The spelling of 285643801 in words is "two hundred eighty-five million, six hundred forty-three thousand, eight hundred one".