285385190 has 16 divisors (see below), whose sum is σ = 518682528. Its totient is φ = 113045376.

The previous prime is 285385189. The next prime is 285385193. The reversal of 285385190 is 91583582.

It is a super-2 number, since 2×285385190² = 162889413342672200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285385193) 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 7 ways as a sum of consecutive naturals, for example, 137507 + ... + 139566.

It is an arithmetic number, because the mean of its divisors is an integer number (32417658).

Almost surely, 2^285385190 is an apocalyptic number.

285385190 is a deficient number, since it is larger than the sum of its proper divisors (233297338).

285385190 is a wasteful number, since it uses less digits than its factorization.

285385190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277183.

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 285385190 is about 16893.3475072290. The cubic root of 285385190 is about 658.3807797170.

The spelling of 285385190 in words is "two hundred eighty-five million, three hundred eighty-five thousand, one hundred ninety".