285320080 has 40 divisors (see below), whose sum is σ = 677492352. Its totient is φ = 111698304.

The previous prime is 285320071. The next prime is 285320081. The reversal of 285320080 is 80023582.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (285320081) 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, 34182 + ... + 41701.

Almost surely, 2^285320080 is an apocalyptic number.

285320080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285320080 is an abundant number, since it is smaller than the sum of its proper divisors (392172272).

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

285320080 is a wasteful number, since it uses less digits than its factorization.

285320080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75943 (or 75937 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 285320080 is about 16891.4203073631. The cubic root of 285320080 is about 658.3307065358.

The spelling of 285320080 in words is "two hundred eighty-five million, three hundred twenty thousand, eighty".