4006386 has 24 divisors (see below), whose sum is σ = 8802300. Its totient is φ = 1316736.

The previous prime is 4006381. The next prime is 4006403. The reversal of 4006386 is 6836004.

It can be written as a sum of positive squares in 2 ways, for example, as 3861225 + 145161 = 1965^2 + 381^2 .

It is a super-2 number, since 2×4006386² = 32102257561992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 211 + ... + 2838.

Almost surely, 2^4006386 is an apocalyptic number.

4006386 is an abundant number, since it is smaller than the sum of its proper divisors (4795914).

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

4006386 is a wasteful number, since it uses less digits than its factorization.

4006386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130 (or 3127 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 4006386 is about 2001.5958633051. The cubic root of 4006386 is about 158.8245364739.

It can be divided in two parts, 400 and 6386, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 4006386 in words is "four million, six thousand, three hundred eighty-six".