489390831 has 24 divisors (see below), whose sum is σ = 730970240. Its totient is φ = 315187200.

The previous prime is 489390829. The next prime is 489390841. The reversal of 489390831 is 138093984.

489390831 is a `hidden beast` number, since 489 + 3 + 90 + 83 + 1 = 666.

It is not a de Polignac number, because 489390831 - 2¹ = 489390829 is a prime.

It is a super-2 number, since 2×489390831² = 479006770933741122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489390821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213411 + ... + 215691.

Almost surely, 2^489390831 is an apocalyptic number.

489390831 is a deficient number, since it is larger than the sum of its proper divisors (241579409).

489390831 is a wasteful number, since it uses less digits than its factorization.

489390831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087 (or 3084 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 489390831 is about 22122.1796168461. The cubic root of 489390831 is about 788.0466783097.

The spelling of 489390831 in words is "four hundred eighty-nine million, three hundred ninety thousand, eight hundred thirty-one".