491430040 has 32 divisors (see below), whose sum is σ = 1106829360. Its totient is φ = 196374400.

The previous prime is 491430019. The next prime is 491430053. The reversal of 491430040 is 40034194.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 491429987 and 491430014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38010 + ... + 49270.

Almost surely, 2^491430040 is an apocalyptic number.

491430040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491430040 is an abundant number, since it is smaller than the sum of its proper divisors (615399320).

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

491430040 is a wasteful number, since it uses less digits than its factorization.

491430040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12363 (or 12359 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 491430040 is about 22168.2213991109. The cubic root of 491430040 is about 789.1397140516.

The spelling of 491430040 in words is "four hundred ninety-one million, four hundred thirty thousand, forty".