490002021 has 32 divisors (see below), whose sum is σ = 749414400. Its totient is φ = 316269360.

The previous prime is 490002017. The next prime is 490002031. The reversal of 490002021 is 120200094.

It is not a de Polignac number, because 490002021 - 2² = 490002017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 490001985 and 490002003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490002011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104436 + ... + 109026.

It is an arithmetic number, because the mean of its divisors is an integer number (23419200).

Almost surely, 2^490002021 is an apocalyptic number.

It is an amenable number.

490002021 is a deficient number, since it is larger than the sum of its proper divisors (259412379).

490002021 is a wasteful number, since it uses less digits than its factorization.

490002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4726 (or 4720 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 490002021 is about 22135.9892708684. The cubic root of 490002021 is about 788.3746001885.

The spelling of 490002021 in words is "four hundred ninety million, two thousand, twenty-one".