491340400 has 30 divisors (see below), whose sum is σ = 1180446272. Its totient is φ = 196536000.

The previous prime is 491340383. The next prime is 491340419. The reversal of 491340400 is 4043194.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 613776 + ... + 614575.

Almost surely, 2^491340400 is an apocalyptic number.

491340400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491340400 is an abundant number, since it is smaller than the sum of its proper divisors (689105872).

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

491340400 is a wasteful number, since it uses less digits than its factorization.

491340400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228369 (or 1228358 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 491340400 is about 22166.1994938239. The cubic root of 491340400 is about 789.0917297475.

Adding to 491340400 its reverse (4043194), we get a palindrome (495383594).

The spelling of 491340400 in words is "four hundred ninety-one million, three hundred forty thousand, four hundred".