491380 has 24 divisors (see below), whose sum is σ = 1048320. Its totient is φ = 193440.

The previous prime is 491377. The next prime is 491417. The reversal of 491380 is 83194.

It is an Ulam number.

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, 1425 + ... + 1735.

It is an arithmetic number, because the mean of its divisors is an integer number (43680).

2⁴⁹¹³⁸⁰ is an apocalyptic number.

It is an amenable number.

491380 is an abundant number, since it is smaller than the sum of its proper divisors (556940).

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

491380 is a wasteful number, since it uses less digits than its factorization.

491380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 491380 is about 700.9850212380. The cubic root of 491380 is about 78.9112928352.

The spelling of 491380 in words is "four hundred ninety-one thousand, three hundred eighty".