491788012 has 12 divisors (see below), whose sum is σ = 870299640. Its totient is φ = 243130976.

The previous prime is 491787971. The next prime is 491788027. The reversal of 491788012 is 210887194.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690358 + ... + 691069.

It is an arithmetic number, because the mean of its divisors is an integer number (72524970).

Almost surely, 2^491788012 is an apocalyptic number.

It is an amenable number.

491788012 is a deficient number, since it is larger than the sum of its proper divisors (378511628).

491788012 is a wasteful number, since it uses less digits than its factorization.

491788012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381520 (or 1381518 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 491788012 is about 22176.2939194086. The cubic root of 491788012 is about 789.3312783539.

It can be divided in two parts, 4917 and 88012, that added together give a palindrome (92929).

The spelling of 491788012 in words is "four hundred ninety-one million, seven hundred eighty-eight thousand, twelve".