4001389 has 12 divisors (see below), whose sum is σ = 4698624. Its totient is φ = 3397464.

The previous prime is 4001383. The next prime is 4001399. The reversal of 4001389 is 9831004.

It is not a de Polignac number, because 4001389 - 2⁵ = 4001357 is a prime.

It is a super-2 number, since 2×4001389² = 32022227858642, which contains 22 as substring.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5902 + ... + 6544.

It is an arithmetic number, because the mean of its divisors is an integer number (391552).

Almost surely, 2^4001389 is an apocalyptic number.

4001389 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

4001389 is a deficient number, since it is larger than the sum of its proper divisors (697235).

4001389 is a wasteful number, since it uses less digits than its factorization.

4001389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784 (or 777 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 4001389 is about 2000.3472198596. The cubic root of 4001389 is about 158.7584772376.

The spelling of 4001389 in words is "four million, one thousand, three hundred eighty-nine".