285120069 has 32 divisors (see below), whose sum is σ = 415833600. Its totient is φ = 173759040.

The previous prime is 285120047. The next prime is 285120079. The reversal of 285120069 is 960021582.

It is not a de Polignac number, because 285120069 - 2⁹ = 285119557 is a prime.

It is a super-2 number, since 2×285120069² = 162586907493129522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285120079) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1192852 + ... + 1193090.

It is an arithmetic number, because the mean of its divisors is an integer number (12994800).

Almost surely, 2^285120069 is an apocalyptic number.

It is an amenable number.

285120069 is a deficient number, since it is larger than the sum of its proper divisors (130713531).

285120069 is a wasteful number, since it uses less digits than its factorization.

285120069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 285120069 is about 16885.4987785378. The cubic root of 285120069 is about 658.1768393856.

The spelling of 285120069 in words is "two hundred eighty-five million, one hundred twenty thousand, sixty-nine".