491400516 has 12 divisors (see below), whose sum is σ = 1146601232. Its totient is φ = 163800168.

The previous prime is 491400479. The next prime is 491400523. The reversal of 491400516 is 615004194.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20475010 + ... + 20475033.

Almost surely, 2^491400516 is an apocalyptic number.

It is an amenable number.

491400516 is an abundant number, since it is smaller than the sum of its proper divisors (655200716).

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

491400516 is a wasteful number, since it uses less digits than its factorization.

491400516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40950050 (or 40950048 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 491400516 is about 22167.5554809275. Note that the first 3 decimals coincide. The cubic root of 491400516 is about 789.1239104949.

The spelling of 491400516 in words is "four hundred ninety-one million, four hundred thousand, five hundred sixteen".