490745890 has 32 divisors (see below), whose sum is σ = 893345904. Its totient is φ = 194088960.

The previous prime is 490745881. The next prime is 490745891. The reversal of 490745890 is 98547094.

It can be written as a sum of positive squares in 8 ways, for example, as 391683681 + 99062209 = 19791^2 + 9953^2 .

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 490745890.

It is not an unprimeable number, because it can be changed into a prime (490745891) 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, 377722 + ... + 379018.

Almost surely, 2^490745890 is an apocalyptic number.

490745890 is a deficient number, since it is larger than the sum of its proper divisors (402600014).

490745890 is a wasteful number, since it uses less digits than its factorization.

490745890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 490745890 is about 22152.7851522105. The cubic root of 490745890 is about 788.7733406628.

The spelling of 490745890 in words is "four hundred ninety million, seven hundred forty-five thousand, eight hundred ninety".