285388961 has 8 divisors (see below), whose sum is σ = 335282304. Its totient is φ = 239487120.

The previous prime is 285388903. The next prime is 285388993. The reversal of 285388961 is 169883582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 285388961 - 2⁶ = 285388897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285388361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 997721 + ... + 998006.

It is an arithmetic number, because the mean of its divisors is an integer number (41910288).

Almost surely, 2^285388961 is an apocalyptic number.

It is an amenable number.

285388961 is a deficient number, since it is larger than the sum of its proper divisors (49893343).

285388961 is a wasteful number, since it uses less digits than its factorization.

285388961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995751.

The product of its digits is 829440, while the sum is 50.

The square root of 285388961 is about 16893.4591188424. The cubic root of 285388961 is about 658.3836795907.

The spelling of 285388961 in words is "two hundred eighty-five million, three hundred eighty-eight thousand, nine hundred sixty-one".