491308092 has 252 divisors, whose sum is σ = 1522059336. Its totient is φ = 137479680.

The previous prime is 491308079. The next prime is 491308117. The reversal of 491308092 is 290803194.

491308092 is a `hidden beast` number, since 491 + 3 + 0 + 80 + 92 = 666.

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

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 9269938 + ... + 9269990.

It is an arithmetic number, because the mean of its divisors is an integer number (6039918).

Almost surely, 2^491308092 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 491308092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (761029668).

491308092 is an abundant number, since it is smaller than the sum of its proper divisors (1030751244).

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

491308092 is a wasteful number, since it uses less digits than its factorization.

491308092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 491308092 is about 22165.4707146047. The cubic root of 491308092 is about 789.0744338400.

The spelling of 491308092 in words is "four hundred ninety-one million, three hundred eight thousand, ninety-two".