4000387 has 4 divisors (see below), whose sum is σ = 4075920. Its totient is φ = 3924856.

The previous prime is 4000379. The next prime is 4000439. The reversal of 4000387 is 7830004.

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

It is a cyclic number.

It is not a de Polignac number, because 4000387 - 2³ = 4000379 is a prime.

It is a super-3 number, since 3×4000387³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4000357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37687 + ... + 37792.

It is an arithmetic number, because the mean of its divisors is an integer number (1018980).

Almost surely, 2^4000387 is an apocalyptic number.

4000387 is a deficient number, since it is larger than the sum of its proper divisors (75533).

4000387 is an equidigital number, since it uses as much as digits as its factorization.

4000387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75532.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 4000387 is about 2000.0967476600. The cubic root of 4000387 is about 158.7452244001.

The spelling of 4000387 in words is "four million, three hundred eighty-seven", and thus it is an aban number.