494493660 has 60 divisors (see below), whose sum is σ = 1551250008. Its totient is φ = 131864544.

The previous prime is 494493647. The next prime is 494493667. The reversal of 494493660 is 66394494.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494493667) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 151002 + ... + 154241.

Almost surely, 2^494493660 is an apocalyptic number.

It is an amenable number.

494493660 is an abundant number, since it is smaller than the sum of its proper divisors (1056756348).

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

494493660 is a wasteful number, since it uses less digits than its factorization.

494493660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305264 (or 305253 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The square root of 494493660 is about 22237.2134045613. The cubic root of 494493660 is about 790.7761746157.

The spelling of 494493660 in words is "four hundred ninety-four million, four hundred ninety-three thousand, six hundred sixty".