489991542 has 16 divisors (see below), whose sum is σ = 981478080. Its totient is φ = 163081352.

The previous prime is 489991507. The next prime is 489991543. The reversal of 489991542 is 245199984.

It is a super-2 number, since 2×489991542² = 480183422463075528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489991543) 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 7 ways as a sum of consecutive naturals, for example, 58008 + ... + 65915.

It is an arithmetic number, because the mean of its divisors is an integer number (61342380).

Almost surely, 2^489991542 is an apocalyptic number.

489991542 is an abundant number, since it is smaller than the sum of its proper divisors (491486538).

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

489991542 is a wasteful number, since it uses less digits than its factorization.

489991542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124587.

The product of its digits is 933120, while the sum is 51.

The square root of 489991542 is about 22135.7525736082. The cubic root of 489991542 is about 788.3689801870.

The spelling of 489991542 in words is "four hundred eighty-nine million, nine hundred ninety-one thousand, five hundred forty-two".