491686226 has 16 divisors (see below), whose sum is σ = 794423808. Its totient is φ = 227568000.

The previous prime is 491686201. The next prime is 491686277. The reversal of 491686226 is 622686194.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170975 + ... + 173826.

It is an arithmetic number, because the mean of its divisors is an integer number (49651488).

Almost surely, 2^491686226 is an apocalyptic number.

491686226 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

491686226 is a deficient number, since it is larger than the sum of its proper divisors (302737582).

491686226 is a wasteful number, since it uses less digits than its factorization.

491686226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344857.

The product of its digits is 248832, while the sum is 44.

The square root of 491686226 is about 22173.9988725534. The cubic root of 491686226 is about 789.2768182918.

The spelling of 491686226 in words is "four hundred ninety-one million, six hundred eighty-six thousand, two hundred twenty-six".