285004390 has 32 divisors (see below), whose sum is σ = 577704960. Its totient is φ = 100293600.

The previous prime is 285004367. The next prime is 285004411. The reversal of 285004390 is 93400582.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38380 + ... + 45199.

It is an arithmetic number, because the mean of its divisors is an integer number (18053280).

Almost surely, 2^285004390 is an apocalyptic number.

285004390 is an abundant number, since it is smaller than the sum of its proper divisors (292700570).

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

285004390 is a wasteful number, since it uses less digits than its factorization.

285004390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83628.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 285004390 is about 16882.0730362121. The cubic root of 285004390 is about 658.0878154433.

The spelling of 285004390 in words is "two hundred eighty-five million, four thousand, three hundred ninety".