490699890 has 128 divisors (see below), whose sum is σ = 1411603200. Its totient is φ = 120890880.

The previous prime is 490699879. The next prime is 490699943. The reversal of 490699890 is 98996094.

It is a happy number.

490699890 is a `hidden beast` number, since 490 + 69 + 9 + 8 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 209164 + ... + 211496.

It is an arithmetic number, because the mean of its divisors is an integer number (11028150).

Almost surely, 2^490699890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 490699890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (705801600).

490699890 is an abundant number, since it is smaller than the sum of its proper divisors (920903310).

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

490699890 is a wasteful number, since it uses less digits than its factorization.

490699890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409 (or 2403 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The square root of 490699890 is about 22151.7468837110. The cubic root of 490699890 is about 788.7486947051.

The spelling of 490699890 in words is "four hundred ninety million, six hundred ninety-nine thousand, eight hundred ninety".