4890391 has 8 divisors (see below), whose sum is σ = 5616000. Its totient is φ = 4211640.

The previous prime is 4890383. The next prime is 4890419. The reversal of 4890391 is 1930984.

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 4890391 - 2³ = 4890383 is a prime.

It is a Duffinian number.

4890391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4890311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11491 + ... + 11908.

It is an arithmetic number, because the mean of its divisors is an integer number (702000).

Almost surely, 2^4890391 is an apocalyptic number.

4890391 is a deficient number, since it is larger than the sum of its proper divisors (725609).

4890391 is a wasteful number, since it uses less digits than its factorization.

4890391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23429.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 4890391 is about 2211.4228451384. The cubic root of 4890391 is about 169.7388261801.

It can be divided in two parts, 4890 and 391, that multiplied together give a triangular number (1911990 = T₁₉₅₅).

The spelling of 4890391 in words is "four million, eight hundred ninety thousand, three hundred ninety-one".