4387866 has 16 divisors (see below), whose sum is σ = 10029504. Its totient is φ = 1253664.

The previous prime is 4387847. The next prime is 4387891. The reversal of 4387866 is 6687834.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 104473 = 4387866 / (4 + 3 + 8 + 7 + 8 + 6 + 6).

It is a d-powerful number, because it can be written as 4¹¹ + 3¹¹ + 8 + 7³ + 8³ + 6⁵ + 6⁵ .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52195 + ... + 52278.

It is an arithmetic number, because the mean of its divisors is an integer number (626844).

Almost surely, 2^4387866 is an apocalyptic number.

4387866 is an abundant number, since it is smaller than the sum of its proper divisors (5641638).

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

4387866 is a wasteful number, since it uses less digits than its factorization.

4387866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104485.

The product of its digits is 193536, while the sum is 42.

The square root of 4387866 is about 2094.7233707581. The cubic root of 4387866 is about 163.7134844670.

Subtracting 4387866 from its reverse (6687834), we obtain a cube (2299968 = 132³).

It can be divided in two parts, 4387 and 866, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 4387866 in words is "four million, three hundred eighty-seven thousand, eight hundred sixty-six".