4990385 has 4 divisors (see below), whose sum is σ = 5988468. Its totient is φ = 3992304.

The previous prime is 4990357. The next prime is 4990393. The reversal of 4990385 is 5830994.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1934881 + 3055504 = 1391^2 + 1748^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4990385 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499034 + ... + 499043.

It is an arithmetic number, because the mean of its divisors is an integer number (1497117).

Almost surely, 2^4990385 is an apocalyptic number.

It is an amenable number.

4990385 is a deficient number, since it is larger than the sum of its proper divisors (998083).

4990385 is an equidigital number, since it uses as much as digits as its factorization.

4990385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998082.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 4990385 is about 2233.9169635418. The cubic root of 4990385 is about 170.8879148747.

The spelling of 4990385 in words is "four million, nine hundred ninety thousand, three hundred eighty-five".