285407236 has 9 divisors (see below), whose sum is σ = 499521799. Its totient is φ = 142686724.

The previous prime is 285407231. The next prime is 285407257. The reversal of 285407236 is 632704582.

The square root of 285407236 is 16894.

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

It is a super-2 number, since 2×285407236² = 162914580722319392, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 285407195 and 285407204.

It is not an unprimeable number, because it can be changed into a prime (285407231) 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, 29565 + ... + 38011.

Almost surely, 2^285407236 is an apocalyptic number.

285407236 is the 16894-th square number.

It is an amenable number.

285407236 is a deficient number, since it is larger than the sum of its proper divisors (214114563).

285407236 is an frugal number, since it uses more digits than its factorization.

285407236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16898 (or 8449 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The cubic root of 285407236 is about 658.3977325810.

The spelling of 285407236 in words is "two hundred eighty-five million, four hundred seven thousand, two hundred thirty-six".