491277402 has 96 divisors (see below), whose sum is σ = 1338015744. Its totient is φ = 126554400.

The previous prime is 491277389. The next prime is 491277431. The reversal of 491277402 is 204772194.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 174627 + ... + 177417.

It is an arithmetic number, because the mean of its divisors is an integer number (13937664).

Almost surely, 2^491277402 is an apocalyptic number.

491277402 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 491277402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (669007872).

491277402 is an abundant number, since it is smaller than the sum of its proper divisors (846738342).

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

491277402 is a wasteful number, since it uses less digits than its factorization.

491277402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2944 (or 2941 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 491277402 is about 22164.7784108030. The cubic root of 491277402 is about 789.0580034174.

The spelling of 491277402 in words is "four hundred ninety-one million, two hundred seventy-seven thousand, four hundred two".