4390660 has 12 divisors (see below), whose sum is σ = 9220428. Its totient is φ = 1756256.

The previous prime is 4390657. The next prime is 4390663. The reversal of 4390660 is 660934.

It is an interprime number because it is at equal distance from previous prime (4390657) and next prime (4390663).

It can be written as a sum of positive squares in 2 ways, for example, as 3211264 + 1179396 = 1792^2 + 1086^2 .

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (4390663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109747 + ... + 109786.

It is an arithmetic number, because the mean of its divisors is an integer number (768369).

Almost surely, 2^4390660 is an apocalyptic number.

It is an amenable number.

4390660 is an abundant number, since it is smaller than the sum of its proper divisors (4829768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4390660 is a wasteful number, since it uses less digits than its factorization.

4390660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219542 (or 219540 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 4390660 is about 2095.3901784632. The cubic root of 4390660 is about 163.7482256086.

It can be divided in two parts, 4390 and 660, that added together give a triangular number (5050 = T₁₀₀).

The spelling of 4390660 in words is "four million, three hundred ninety thousand, six hundred sixty".