491415400 has 48 divisors (see below), whose sum is σ = 1305764640. Its totient is φ = 168484800.

The previous prime is 491415391. The next prime is 491415437. The reversal of 491415400 is 4514194.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174106 + ... + 176905.

It is an arithmetic number, because the mean of its divisors is an integer number (27203430).

Almost surely, 2^491415400 is an apocalyptic number.

491415400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491415400 is an abundant number, since it is smaller than the sum of its proper divisors (814349240).

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

491415400 is a wasteful number, since it uses less digits than its factorization.

491415400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351034 (or 351025 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 491415400 is about 22167.8911942476. The cubic root of 491415400 is about 789.1318776563.

Adding to 491415400 its reverse (4514194), we get a palindrome (495929594).

The spelling of 491415400 in words is "four hundred ninety-one million, four hundred fifteen thousand, four hundred".