491405700 has 36 divisors (see below), whose sum is σ = 1421801360. Its totient is φ = 131041440.

The previous prime is 491405693. The next prime is 491405737. The reversal of 491405700 is 7504194.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 818710 + ... + 819309.

Almost surely, 2^491405700 is an apocalyptic number.

It is an amenable number.

491405700 is an abundant number, since it is smaller than the sum of its proper divisors (930395660).

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

491405700 is a wasteful number, since it uses less digits than its factorization.

491405700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638036 (or 1638029 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 491405700 is about 22167.6724082615. The cubic root of 491405700 is about 789.1266854235.

Adding to 491405700 its reverse (7504194), we get a palindrome (498909894).

The spelling of 491405700 in words is "four hundred ninety-one million, four hundred five thousand, seven hundred".