490693643 has 16 divisors (see below), whose sum is σ = 542108160. Its totient is φ = 440450400.

The previous prime is 490693633. The next prime is 490693669. The reversal of 490693643 is 346396094.

It is a cyclic number.

It is not a de Polignac number, because 490693643 - 2⁸ = 490693387 is a prime.

It is a super-2 number, since 2×490693643² = 481560502561222898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 490693594 and 490693603.

It is not an unprimeable number, because it can be changed into a prime (490693633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329246 + ... + 330732.

It is an arithmetic number, because the mean of its divisors is an integer number (33881760).

Almost surely, 2^490693643 is an apocalyptic number.

490693643 is a deficient number, since it is larger than the sum of its proper divisors (51414517).

490693643 is a wasteful number, since it uses less digits than its factorization.

490693643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858.

The product of its (nonzero) digits is 419904, while the sum is 44.

The square root of 490693643 is about 22151.6058785814. The cubic root of 490693643 is about 788.7453475581.

The spelling of 490693643 in words is "four hundred ninety million, six hundred ninety-three thousand, six hundred forty-three".