491097756 has 24 divisors (see below), whose sum is σ = 1156410640. Its totient is φ = 162196992.

The previous prime is 491097721. The next prime is 491097767. The reversal of 491097756 is 657790194.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 186421 + ... + 189036.

Almost surely, 2^491097756 is an apocalyptic number.

It is an amenable number.

491097756 is an abundant number, since it is smaller than the sum of its proper divisors (665312884).

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

491097756 is a wasteful number, since it uses less digits than its factorization.

491097756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375573 (or 375571 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 48.

The square root of 491097756 is about 22160.7255296391. The cubic root of 491097756 is about 788.9618130946.

It can be divided in two parts, 49109 and 7756, that added together give a palindrome (56865).

The spelling of 491097756 in words is "four hundred ninety-one million, ninety-seven thousand, seven hundred fifty-six".