491356152 has 128 divisors (see below), whose sum is σ = 1602201600. Its totient is φ = 136577664.

The previous prime is 491356111. The next prime is 491356183. The reversal of 491356152 is 251653194.

491356152 is a `hidden beast` number, since 4 + 9 + 1 + 35 + 615 + 2 = 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 (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51553 + ... + 60335.

It is an arithmetic number, because the mean of its divisors is an integer number (12517200).

Almost surely, 2^491356152 is an apocalyptic number.

491356152 is a gapful number since it is divisible by the number (42) 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 491356152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (801100800).

491356152 is an abundant number, since it is smaller than the sum of its proper divisors (1110845448).

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

491356152 is a wasteful number, since it uses less digits than its factorization.

491356152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8842 (or 8832 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 491356152 is about 22166.5548067353. The cubic root of 491356152 is about 789.1001622179.

The spelling of 491356152 in words is "four hundred ninety-one million, three hundred fifty-six thousand, one hundred fifty-two".