285319978 has 8 divisors (see below), whose sum is σ = 431350272. Its totient is φ = 141536556.

The previous prime is 285319973. The next prime is 285320023. The reversal of 285319978 is 879913582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (285319973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561400 + ... + 561907.

It is an arithmetic number, because the mean of its divisors is an integer number (53918784).

Almost surely, 2^285319978 is an apocalyptic number.

285319978 is a deficient number, since it is larger than the sum of its proper divisors (146030294).

285319978 is a wasteful number, since it uses less digits than its factorization.

285319978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123436.

The product of its digits is 1088640, while the sum is 52.

The square root of 285319978 is about 16891.4172880786. The cubic root of 285319978 is about 658.3306280862.

The spelling of 285319978 in words is "two hundred eighty-five million, three hundred nineteen thousand, nine hundred seventy-eight".