490840890 has 64 divisors (see below), whose sum is σ = 1215768960. Its totient is φ = 126731520.

The previous prime is 490840879. The next prime is 490840913. The reversal of 490840890 is 98048094.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 253225 + ... + 255155.

It is an arithmetic number, because the mean of its divisors is an integer number (18996390).

Almost surely, 2^490840890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 490840890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (607884480).

490840890 is an abundant number, since it is smaller than the sum of its proper divisors (724928070).

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

490840890 is a wasteful number, since it uses less digits than its factorization.

490840890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 490840890 is about 22154.9292483637. The cubic root of 490840890 is about 788.8242350491.

The spelling of 490840890 in words is "four hundred ninety million, eight hundred forty thousand, eight hundred ninety".