494321890 has 32 divisors (see below), whose sum is σ = 900376560. Its totient is φ = 195385344.

The previous prime is 494321873. The next prime is 494321897. The reversal of 494321890 is 98123494.

It can be written as a sum of positive squares in 8 ways, for example, as 7634169 + 486687721 = 2763^2 + 22061^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (494321897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 696856 + ... + 697564.

Almost surely, 2^494321890 is an apocalyptic number.

494321890 is a deficient number, since it is larger than the sum of its proper divisors (406054670).

494321890 is a wasteful number, since it uses less digits than its factorization.

494321890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 494321890 is about 22233.3508495683. The cubic root of 494321890 is about 790.6846012446.

The spelling of 494321890 in words is "four hundred ninety-four million, three hundred twenty-one thousand, eight hundred ninety".