285481816 has 32 divisors (see below), whose sum is σ = 579957840. Its totient is φ = 131217408.

The previous prime is 285481789. The next prime is 285481817. The reversal of 285481816 is 618184582.

It is a super-3 number, since 3×285481816³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285481817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18561 + ... + 30256.

Almost surely, 2^285481816 is an apocalyptic number.

It is an amenable number.

285481816 is an abundant number, since it is smaller than the sum of its proper divisors (294476024).

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

285481816 is a wasteful number, since it uses less digits than its factorization.

285481816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48883 (or 48879 counting only the distinct ones).

The product of its digits is 122880, while the sum is 43.

The square root of 285481816 is about 16896.2071483514. The cubic root of 285481816 is about 658.4550764045.

The spelling of 285481816 in words is "two hundred eighty-five million, four hundred eighty-one thousand, eight hundred sixteen".