491307942 has 8 divisors (see below), whose sum is σ = 982615896. Its totient is φ = 163769312.

The previous prime is 491307829. The next prime is 491307979. The reversal of 491307942 is 249703194.

It is a sphenic number, since it is the product of 3 distinct primes.

491307942 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 491307942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40942323 + ... + 40942334.

It is an arithmetic number, because the mean of its divisors is an integer number (122826987).

Almost surely, 2^491307942 is an apocalyptic number.

491307942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

491307942 is a wasteful number, since it uses less digits than its factorization.

491307942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81884662.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 491307942 is about 22165.4673309633. The cubic root of 491307942 is about 789.0743535365.

The spelling of 491307942 in words is "four hundred ninety-one million, three hundred seven thousand, nine hundred forty-two".