491033916 has 144 divisors (see below), whose sum is σ = 1381816800. Its totient is φ = 146313216.

The previous prime is 491033909. The next prime is 491033953. The reversal of 491033916 is 619330194.

It is a super-2 number, since 2×491033916² = 482228613324590112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1295415 + ... + 1295793.

It is an arithmetic number, because the mean of its divisors is an integer number (9595950).

Almost surely, 2^491033916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491033916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (690908400).

491033916 is an abundant number, since it is smaller than the sum of its proper divisors (890782884).

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

491033916 is a wasteful number, since it uses less digits than its factorization.

491033916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 491033916 is about 22159.2850967715. The cubic root of 491033916 is about 788.9276247182.

The spelling of 491033916 in words is "four hundred ninety-one million, thirty-three thousand, nine hundred sixteen".