491276428 has 12 divisors (see below), whose sum is σ = 872566072. Its totient is φ = 241971840.

The previous prime is 491276381. The next prime is 491276449. The reversal of 491276428 is 824672194.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 916293 + ... + 916828.

Almost surely, 2^491276428 is an apocalyptic number.

It is an amenable number.

491276428 is a deficient number, since it is larger than the sum of its proper divisors (381289644).

491276428 is a wasteful number, since it uses less digits than its factorization.

491276428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833192 (or 1833190 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 491276428 is about 22164.7564389957. The cubic root of 491276428 is about 789.0574819585.

It can be divided in two parts, 49127 and 6428, that added together give a palindrome (55555).

The spelling of 491276428 in words is "four hundred ninety-one million, two hundred seventy-six thousand, four hundred twenty-eight".