491209030 has 16 divisors (see below), whose sum is σ = 952190064. Its totient is φ = 181369440.

The previous prime is 491209021. The next prime is 491209049. The reversal of 491209030 is 30902194.

It is a happy number.

It is a super-2 number, since 2×491209030² = 482572622307081800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 491209030.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1889136 + ... + 1889395.

It is an arithmetic number, because the mean of its divisors is an integer number (59511879).

Almost surely, 2^491209030 is an apocalyptic number.

491209030 is a deficient number, since it is larger than the sum of its proper divisors (460981034).

491209030 is a wasteful number, since it uses less digits than its factorization.

491209030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3778551.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 491209030 is about 22163.2360001873. The cubic root of 491209030 is about 789.0213968237.

The spelling of 491209030 in words is "four hundred ninety-one million, two hundred nine thousand, thirty".