285997408 has 24 divisors (see below), whose sum is σ = 563514840. Its totient is φ = 142882560.

The previous prime is 285997403. The next prime is 285997417. The reversal of 285997408 is 804799582.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285997403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47428 + ... + 53116.

It is an arithmetic number, because the mean of its divisors is an integer number (23479785).

Almost surely, 2^285997408 is an apocalyptic number.

It is an amenable number.

285997408 is a deficient number, since it is larger than the sum of its proper divisors (277517432).

285997408 is a wasteful number, since it uses less digits than its factorization.

285997408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7270 (or 7262 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 52.

The square root of 285997408 is about 16911.4578910276. The cubic root of 285997408 is about 658.8512370650.

The spelling of 285997408 in words is "two hundred eighty-five million, nine hundred ninety-seven thousand, four hundred eight".