491658290 has 16 divisors (see below), whose sum is σ = 891354240. Its totient is φ = 195247920.

The previous prime is 491658253. The next prime is 491658341. The reversal of 491658290 is 92856194.

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, 175466 + ... + 178245.

It is an arithmetic number, because the mean of its divisors is an integer number (55709640).

Almost surely, 2^491658290 is an apocalyptic number.

491658290 is a deficient number, since it is larger than the sum of its proper divisors (399695950).

491658290 is a wasteful number, since it uses less digits than its factorization.

491658290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353857.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 491658290 is about 22173.3689366321. The cubic root of 491658290 is about 789.2618699679.

The spelling of 491658290 in words is "four hundred ninety-one million, six hundred fifty-eight thousand, two hundred ninety".