285149893 has 8 divisors (see below), whose sum is σ = 332819712. Its totient is φ = 239213616.

The previous prime is 285149881. The next prime is 285149933. The reversal of 285149893 is 398941582.

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 285149893 - 2²¹ = 283052741 is a prime.

It is a super-2 number, since 2×285149893² = 162620922955822898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285149393) 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, 433030 + ... + 433687.

It is an arithmetic number, because the mean of its divisors is an integer number (41602464).

Almost surely, 2^285149893 is an apocalyptic number.

It is an amenable number.

285149893 is a deficient number, since it is larger than the sum of its proper divisors (47669819).

285149893 is an equidigital number, since it uses as much as digits as its factorization.

285149893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866771.

The product of its digits is 622080, while the sum is 49.

The square root of 285149893 is about 16886.3818800831. The cubic root of 285149893 is about 658.1997873571.

The spelling of 285149893 in words is "two hundred eighty-five million, one hundred forty-nine thousand, eight hundred ninety-three".