490980394 has 4 divisors (see below), whose sum is σ = 736470594. Its totient is φ = 245490196.

The previous prime is 490980389. The next prime is 490980397. The reversal of 490980394 is 493089094.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493089094 = 2 ⋅246544547.

It can be written as a sum of positive squares in only one way, i.e., 302934025 + 188046369 = 17405^2 + 13713^2 .

It is not an unprimeable number, because it can be changed into a prime (490980397) by changing a digit.

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 as a sum of consecutive naturals, namely, 122745097 + ... + 122745100.

Almost surely, 2^490980394 is an apocalyptic number.

490980394 is a deficient number, since it is larger than the sum of its proper divisors (245490200).

490980394 is a wasteful number, since it uses less digits than its factorization.

490980394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245490199.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 490980394 is about 22158.0773985470. The cubic root of 490980394 is about 788.8989596795.

The spelling of 490980394 in words is "four hundred ninety million, nine hundred eighty thousand, three hundred ninety-four".