4001386 has 4 divisors (see below), whose sum is σ = 6002082. Its totient is φ = 2000692.

The previous prime is 4001383. The next prime is 4001399. The reversal of 4001386 is 6831004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3330625 + 670761 = 1825^2 + 819^2 .

It is a super-2 number, since 2×4001386² = 32022179841992, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

4001386 is a modest number, since divided by 1386 gives 4 as remainder.

It is not an unprimeable number, because it can be changed into a prime (4001383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000345 + ... + 1000348.

Almost surely, 2^4001386 is an apocalyptic number.

4001386 is a deficient number, since it is larger than the sum of its proper divisors (2000696).

4001386 is a wasteful number, since it uses less digits than its factorization.

4001386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000695.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 4001386 is about 2000.3464699896. The cubic root of 4001386 is about 158.7584375617.

The spelling of 4001386 in words is "four million, one thousand, three hundred eighty-six".