19894285 has 8 divisors (see below), whose sum is σ = 23902200. Its totient is φ = 15896064.

The previous prime is 19894283. The next prime is 19894289. The reversal of 19894285 is 58249891.

It can be written as a sum of positive squares in 4 ways, for example, as 2829124 + 17065161 = 1682^2 + 4131^2 .

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 19894285 - 2¹ = 19894283 is a prime.

It is a super-2 number, since 2×19894285² = 791565151322450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19894283) 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, 3349 + ... + 7141.

It is an arithmetic number, because the mean of its divisors is an integer number (2987775).

Almost surely, 2^19894285 is an apocalyptic number.

It is an amenable number.

19894285 is a deficient number, since it is larger than the sum of its proper divisors (4007915).

19894285 is a wasteful number, since it uses less digits than its factorization.

19894285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4847.

The product of its digits is 207360, while the sum is 46.

The square root of 19894285 is about 4460.3009988116. The cubic root of 19894285 is about 270.9626587620.

The spelling of 19894285 in words is "nineteen million, eight hundred ninety-four thousand, two hundred eighty-five".