285120140 has 12 divisors (see below), whose sum is σ = 598752336. Its totient is φ = 114048048.

The previous prime is 285120127. The next prime is 285120197. The reversal of 285120140 is 41021582.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7127984 + ... + 7128023.

It is an arithmetic number, because the mean of its divisors is an integer number (49896028).

Almost surely, 2^285120140 is an apocalyptic number.

285120140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285120140 is an abundant number, since it is smaller than the sum of its proper divisors (313632196).

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

285120140 is a wasteful number, since it uses less digits than its factorization.

285120140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14256016 (or 14256014 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 285120140 is about 16885.5008809333. The cubic root of 285120140 is about 658.1768940182.

The spelling of 285120140 in words is "two hundred eighty-five million, one hundred twenty thousand, one hundred forty".