491572394 has 8 divisors (see below), whose sum is σ = 761144448. Its totient is φ = 237857580.

The previous prime is 491572379. The next prime is 491572421. The reversal of 491572394 is 493275194.

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

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, 3964232 + ... + 3964355.

It is an arithmetic number, because the mean of its divisors is an integer number (95143056).

Almost surely, 2^491572394 is an apocalyptic number.

491572394 is a deficient number, since it is larger than the sum of its proper divisors (269572054).

491572394 is a wasteful number, since it uses less digits than its factorization.

491572394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7928620.

The product of its digits is 272160, while the sum is 44.

The square root of 491572394 is about 22171.4319339099. The cubic root of 491572394 is about 789.2159041773.

The spelling of 491572394 in words is "four hundred ninety-one million, five hundred seventy-two thousand, three hundred ninety-four".