285394380 has 48 divisors (see below), whose sum is σ = 802927104. Its totient is φ = 75741120.

The previous prime is 285394367. The next prime is 285394381. The reversal of 285394380 is 83493582.

It is not an unprimeable number, because it can be changed into a prime (285394381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1389 + ... + 23931.

It is an arithmetic number, because the mean of its divisors is an integer number (16727648).

Almost surely, 2^285394380 is an apocalyptic number.

285394380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285394380 is an abundant number, since it is smaller than the sum of its proper divisors (517532724).

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

285394380 is a wasteful number, since it uses less digits than its factorization.

285394380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22766 (or 22764 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 285394380 is about 16893.6195056003. The cubic root of 285394380 is about 658.3878467206.

The spelling of 285394380 in words is "two hundred eighty-five million, three hundred ninety-four thousand, three hundred eighty".