490722861 has 8 divisors (see below), whose sum is σ = 688733920. Its totient is φ = 309930192.

The previous prime is 490722853. The next prime is 490722877. The reversal of 490722861 is 168227094.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 490722861 - 2³ = 490722853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490722851) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4304530 + ... + 4304643.

It is an arithmetic number, because the mean of its divisors is an integer number (86091740).

Almost surely, 2^490722861 is an apocalyptic number.

It is an amenable number.

490722861 is a deficient number, since it is larger than the sum of its proper divisors (198011059).

490722861 is a wasteful number, since it uses less digits than its factorization.

490722861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8609195.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 490722861 is about 22152.2653694831. The cubic root of 490722861 is about 788.7610023388.

The spelling of 490722861 in words is "four hundred ninety million, seven hundred twenty-two thousand, eight hundred sixty-one".