285981696 has 528 divisors, whose sum is σ = 1144485888. Its totient is φ = 66355200.

The previous prime is 285981679. The next prime is 285981697. The reversal of 285981696 is 696189582.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (528).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285981697) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9225201 + ... + 9225231.

Almost surely, 2^285981696 is an apocalyptic number.

285981696 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285981696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (572242944).

285981696 is an abundant number, since it is smaller than the sum of its proper divisors (858504192).

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

285981696 is a wasteful number, since it uses less digits than its factorization.

285981696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 67 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 285981696 is about 16910.9933475240. The cubic root of 285981696 is about 658.8391716174.

The spelling of 285981696 in words is "two hundred eighty-five million, nine hundred eighty-one thousand, six hundred ninety-six".