494487840 has 384 divisors, whose sum is σ = 2058835968. Its totient is φ = 96583680.

The previous prime is 494487817. The next prime is 494487871. The reversal of 494487840 is 48784494.

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

It is a self number, because there is not a number n which added to its sum of digits gives 494487840.

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 63 ways as a sum of consecutive naturals, for example, 627927 + ... + 628713.

It is an arithmetic number, because the mean of its divisors is an integer number (5361552).

Almost surely, 2^494487840 is an apocalyptic number.

494487840 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 494487840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1029417984).

494487840 is an abundant number, since it is smaller than the sum of its proper divisors (1564348128).

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

494487840 is a wasteful number, since it uses less digits than its factorization.

494487840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 48.

The square root of 494487840 is about 22237.0825424560. The cubic root of 494487840 is about 790.7730722265.

The spelling of 494487840 in words is "four hundred ninety-four million, four hundred eighty-seven thousand, eight hundred forty".