491132398 has 8 divisors (see below), whose sum is σ = 740401200. Its totient is φ = 244332000.

The previous prime is 491132377. The next prime is 491132417. The reversal of 491132398 is 893231194.

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

It is a super-2 number, since 2×491132398² = 482422064730460808, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 491132398.

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, 616603 + ... + 617398.

It is an arithmetic number, because the mean of its divisors is an integer number (92550150).

Almost surely, 2^491132398 is an apocalyptic number.

491132398 is a deficient number, since it is larger than the sum of its proper divisors (249268802).

491132398 is a wasteful number, since it uses less digits than its factorization.

491132398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234202.

The product of its digits is 46656, while the sum is 40.

The square root of 491132398 is about 22161.5071238398. The cubic root of 491132398 is about 788.9803637614.

The spelling of 491132398 in words is "four hundred ninety-one million, one hundred thirty-two thousand, three hundred ninety-eight".