494382640 has 20 divisors (see below), whose sum is σ = 1149439824. Its totient is φ = 197753024.

The previous prime is 494382601. The next prime is 494382643. The reversal of 494382640 is 46283494.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 494382593 and 494382602.

It is not an unprimeable number, because it can be changed into a prime (494382643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3089812 + ... + 3089971.

Almost surely, 2^494382640 is an apocalyptic number.

494382640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

494382640 is an abundant number, since it is smaller than the sum of its proper divisors (655057184).

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

494382640 is a wasteful number, since it uses less digits than its factorization.

494382640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6179796 (or 6179790 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 494382640 is about 22234.7169984239. The cubic root of 494382640 is about 790.7169904785.

The spelling of 494382640 in words is "four hundred ninety-four million, three hundred eighty-two thousand, six hundred forty".