285975690 has 256 divisors, whose sum is σ = 940584960. Its totient is φ = 53729280.

The previous prime is 285975659. The next prime is 285975709. The reversal of 285975690 is 96579582.

It is a happy number.

It is a super-2 number, since 2×285975690² = 163564190541952200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 2672617 + ... + 2672723.

It is an arithmetic number, because the mean of its divisors is an integer number (3674160).

Almost surely, 2^285975690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285975690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (470292480).

285975690 is an abundant number, since it is smaller than the sum of its proper divisors (654609270).

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

285975690 is a wasteful number, since it uses less digits than its factorization.

285975690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237.

The product of its (nonzero) digits is 1360800, while the sum is 51.

The square root of 285975690 is about 16910.8157697966. The cubic root of 285975690 is about 658.8345594157.

The spelling of 285975690 in words is "two hundred eighty-five million, nine hundred seventy-five thousand, six hundred ninety".