494791690 has 16 divisors (see below), whose sum is σ = 912348360. Its totient is φ = 193089280.

The previous prime is 494791643. The next prime is 494791691. The reversal of 494791690 is 96197494.

It can be written as a sum of positive squares in 4 ways, for example, as 376786921 + 118004769 = 19411^2 + 10863^2 .

It is a super-2 number, since 2×494791690² = 489637632986112200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (494791691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 602995 + ... + 603814.

Almost surely, 2^494791690 is an apocalyptic number.

494791690 is a deficient number, since it is larger than the sum of its proper divisors (417556670).

494791690 is a wasteful number, since it uses less digits than its factorization.

494791690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206857.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 494791690 is about 22243.9135495533. The cubic root of 494791690 is about 790.9350089354.

The spelling of 494791690 in words is "four hundred ninety-four million, seven hundred ninety-one thousand, six hundred ninety".