491036890 has 16 divisors (see below), whose sum is σ = 922295808. Its totient is φ = 187874896.

The previous prime is 491036827. The next prime is 491036911. The reversal of 491036890 is 98630194.

It is a super-2 number, since 2×491036890² = 482234454681744200, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1067242 + ... + 1067701.

It is an arithmetic number, because the mean of its divisors is an integer number (57643488).

Almost surely, 2^491036890 is an apocalyptic number.

491036890 is a deficient number, since it is larger than the sum of its proper divisors (431258918).

491036890 is a wasteful number, since it uses less digits than its factorization.

491036890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134973.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 491036890 is about 22159.3522017229. The cubic root of 491036890 is about 788.9292174568.

The spelling of 491036890 in words is "four hundred ninety-one million, thirty-six thousand, eight hundred ninety".