491435280 has 240 divisors, whose sum is σ = 1898342784. Its totient is φ = 111605760.

The previous prime is 491435207. The next prime is 491435297. The reversal of 491435280 is 82534194.

491435280 is a `hidden beast` number, since 4 + 91 + 43 + 528 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

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

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, 1416067 + ... + 1416413.

Almost surely, 2^491435280 is an apocalyptic number.

491435280 is a gapful number since it is divisible by the number (40) 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 491435280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (949171392).

491435280 is an abundant number, since it is smaller than the sum of its proper divisors (1406907504).

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

491435280 is a wasteful number, since it uses less digits than its factorization.

491435280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 491435280 is about 22168.3395859952. The cubic root of 491435280 is about 789.1425188438.

The spelling of 491435280 in words is "four hundred ninety-one million, four hundred thirty-five thousand, two hundred eighty".