4005399 has 8 divisors (see below), whose sum is σ = 5373952. Its totient is φ = 2653560.

The previous prime is 4005377. The next prime is 4005433. The reversal of 4005399 is 9935004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4005399 - 2⁵ = 4005367 is a prime.

It is a super-2 number, since 2×4005399² = 32086442298402, which contains 22 as substring.

It is a Duffinian number.

4005399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4005499) 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 7 ways as a sum of consecutive naturals, for example, 3607 + ... + 4584.

It is an arithmetic number, because the mean of its divisors is an integer number (671744).

Almost surely, 2^4005399 is an apocalyptic number.

4005399 is a deficient number, since it is larger than the sum of its proper divisors (1368553).

4005399 is a wasteful number, since it uses less digits than its factorization.

4005399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8357.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 4005399 is about 2001.3492948509. The cubic root of 4005399 is about 158.8114929069.

The spelling of 4005399 in words is "four million, five thousand, three hundred ninety-nine".