4390491 has 8 divisors (see below), whose sum is σ = 6690304. Its totient is φ = 2508840.

The previous prime is 4390489. The next prime is 4390523. The reversal of 4390491 is 1940934.

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

It is not a de Polignac number, because 4390491 - 2¹ = 4390489 is a prime.

It is a super-2 number, since 2×4390491² = 38552822442162, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (4390481) 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, 104515 + ... + 104556.

It is an arithmetic number, because the mean of its divisors is an integer number (836288).

Almost surely, 2^4390491 is an apocalyptic number.

4390491 is a deficient number, since it is larger than the sum of its proper divisors (2299813).

4390491 is a wasteful number, since it uses less digits than its factorization.

4390491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209081.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 4390491 is about 2095.3498514568. The cubic root of 4390491 is about 163.7461246485.

The spelling of 4390491 in words is "four million, three hundred ninety thousand, four hundred ninety-one".