491378 has 16 divisors (see below), whose sum is σ = 791520. Its totient is φ = 228096.

The previous prime is 491377. The next prime is 491417. The reversal of 491378 is 873194.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (491371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2450 + ... + 2642.

It is an arithmetic number, because the mean of its divisors is an integer number (49470).

2⁴⁹¹³⁷⁸ is an apocalyptic number.

491378 is a deficient number, since it is larger than the sum of its proper divisors (300142).

491378 is a wasteful number, since it uses less digits than its factorization.

491378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281.

The product of its digits is 6048, while the sum is 32.

The square root of 491378 is about 700.9835946725. The cubic root of 491378 is about 78.9111857743.

The spelling of 491378 in words is "four hundred ninety-one thousand, three hundred seventy-eight".