491653746 has 64 divisors (see below), whose sum is σ = 1121218560. Its totient is φ = 159621840.

The previous prime is 491653697. The next prime is 491653763. The reversal of 491653746 is 647356194.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 778851 + ... + 779481.

It is an arithmetic number, because the mean of its divisors is an integer number (17519040).

Almost surely, 2^491653746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491653746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (560609280).

491653746 is an abundant number, since it is smaller than the sum of its proper divisors (629564814).

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

491653746 is a wasteful number, since it uses less digits than its factorization.

491653746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996 (or 990 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 491653746 is about 22173.2664711359. The cubic root of 491653746 is about 789.2594384574.

The spelling of 491653746 in words is "four hundred ninety-one million, six hundred fifty-three thousand, seven hundred forty-six".