491386368 has 160 divisors (see below), whose sum is σ = 1445621760. Its totient is φ = 147087360.

The previous prime is 491386367. The next prime is 491386369. The reversal of 491386368 is 863683194.

It is an interprime number because it is at equal distance from previous prime (491386367) and next prime (491386369).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491386367) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2145678 + ... + 2145906.

It is an arithmetic number, because the mean of its divisors is an integer number (9035136).

Almost surely, 2^491386368 is an apocalyptic number.

491386368 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491386368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (722810880).

491386368 is an abundant number, since it is smaller than the sum of its proper divisors (954235392).

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

491386368 is a wasteful number, since it uses less digits than its factorization.

491386368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 372 counting only the distinct ones).

The product of its digits is 746496, while the sum is 48.

The square root of 491386368 is about 22167.2363636065. The cubic root of 491386368 is about 789.1163371531.

The spelling of 491386368 in words is "four hundred ninety-one million, three hundred eighty-six thousand, three hundred sixty-eight".