491063690 has 64 divisors (see below), whose sum is σ = 978469632. Its totient is φ = 176332800.

The previous prime is 491063689. The next prime is 491063701. The reversal of 491063690 is 96360194.

It is a super-2 number, since 2×491063690² = 482287095272832200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 765770 + ... + 766410.

It is an arithmetic number, because the mean of its divisors is an integer number (15288588).

Almost surely, 2^491063690 is an apocalyptic number.

491063690 is a deficient number, since it is larger than the sum of its proper divisors (487405942).

491063690 is a wasteful number, since it uses less digits than its factorization.

491063690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 491063690 is about 22159.9569042902. The cubic root of 491063690 is about 788.9435700230.

The spelling of 491063690 in words is "four hundred ninety-one million, sixty-three thousand, six hundred ninety".