490742389 has 8 divisors (see below), whose sum is σ = 495797400. Its totient is φ = 485700096.

The previous prime is 490742387. The next prime is 490742401. The reversal of 490742389 is 983247094.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14062500 + 476679889 = 3750^2 + 21833^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 490742389 - 2¹ = 490742387 is a prime.

It is a super-2 number, since 2×490742389² = 481656184722854642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490742387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87337 + ... + 92785.

It is an arithmetic number, because the mean of its divisors is an integer number (61974675).

Almost surely, 2^490742389 is an apocalyptic number.

It is an amenable number.

490742389 is a deficient number, since it is larger than the sum of its proper divisors (5055011).

490742389 is a wasteful number, since it uses less digits than its factorization.

490742389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6359.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 490742389 is about 22152.7061326602. The cubic root of 490742389 is about 788.7714649453.

The spelling of 490742389 in words is "four hundred ninety million, seven hundred forty-two thousand, three hundred eighty-nine".