490045890 has 32 divisors (see below), whose sum is σ = 1184581440. Its totient is φ = 129737664.

The previous prime is 490045873. The next prime is 490045901. The reversal of 490045890 is 98540094.

490045890 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 54589 + ... + 62928.

It is an arithmetic number, because the mean of its divisors is an integer number (37018170).

Almost surely, 2^490045890 is an apocalyptic number.

490045890 is an abundant number, since it is smaller than the sum of its proper divisors (694535550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

490045890 is a wasteful number, since it uses less digits than its factorization.

490045890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117666.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 490045890 is about 22136.9801463524. The cubic root of 490045890 is about 788.3981267400.

The spelling of 490045890 in words is "four hundred ninety million, forty-five thousand, eight hundred ninety".