285372216 has 24 divisors (see below), whose sum is σ = 772883280. Its totient is φ = 95124048.

The previous prime is 285372179. The next prime is 285372221. The reversal of 285372216 is 612273582.

285372216 is a `hidden beast` number, since 285 + 372 + 2 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1981680 + ... + 1981823.

It is an arithmetic number, because the mean of its divisors is an integer number (32203470).

Almost surely, 2^285372216 is an apocalyptic number.

It is an amenable number.

285372216 is an abundant number, since it is smaller than the sum of its proper divisors (487511064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285372216 is a wasteful number, since it uses less digits than its factorization.

285372216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3963515 (or 3963508 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 285372216 is about 16892.9635055546. The cubic root of 285372216 is about 658.3708026031.

The spelling of 285372216 in words is "two hundred eighty-five million, three hundred seventy-two thousand, two hundred sixteen".