491878212 has 48 divisors (see below), whose sum is σ = 1312789632. Its totient is φ = 140417280.

The previous prime is 491878199. The next prime is 491878237. The reversal of 491878212 is 212878194.

It is a super-3 number, since 3×491878212³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159162 + ... + 162222.

It is an arithmetic number, because the mean of its divisors is an integer number (27349784).

Almost surely, 2^491878212 is an apocalyptic number.

491878212 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

491878212 is an abundant number, since it is smaller than the sum of its proper divisors (820911420).

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

491878212 is a wasteful number, since it uses less digits than its factorization.

491878212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4988 (or 4986 counting only the distinct ones).

The product of its digits is 64512, while the sum is 42.

The square root of 491878212 is about 22178.3275293697. The cubic root of 491878212 is about 789.3795331081.

The spelling of 491878212 in words is "four hundred ninety-one million, eight hundred seventy-eight thousand, two hundred twelve".