491719490 has 16 divisors (see below), whose sum is σ = 885557880. Its totient is φ = 196584960.

The previous prime is 491719471. The next prime is 491719541. The reversal of 491719490 is 94917194.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 210453049 + 281266441 = 14507^2 + 16771^2 .

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, 8996 + ... + 32624.

Almost surely, 2^491719490 is an apocalyptic number.

491719490 is a deficient number, since it is larger than the sum of its proper divisors (393838390).

491719490 is a wasteful number, since it uses less digits than its factorization.

491719490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25717.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 491719490 is about 22174.7489275527. The cubic root of 491719490 is about 789.2946168461.

The spelling of 491719490 in words is "four hundred ninety-one million, seven hundred nineteen thousand, four hundred ninety".