285516380 has 12 divisors (see below), whose sum is σ = 599584440. Its totient is φ = 114206544.

The previous prime is 285516373. The next prime is 285516389. The reversal of 285516380 is 83615582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285516389) 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, 7137890 + ... + 7137929.

It is an arithmetic number, because the mean of its divisors is an integer number (49965370).

Almost surely, 2^285516380 is an apocalyptic number.

285516380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285516380 is an abundant number, since it is smaller than the sum of its proper divisors (314068060).

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

285516380 is a wasteful number, since it uses less digits than its factorization.

285516380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14275828 (or 14275826 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 285516380 is about 16897.2299504978. The cubic root of 285516380 is about 658.4816489350.

The spelling of 285516380 in words is "two hundred eighty-five million, five hundred sixteen thousand, three hundred eighty".