4000819 has 4 divisors (see below), whose sum is σ = 4024944. Its totient is φ = 3976696.

The previous prime is 4000813. The next prime is 4000823. The reversal of 4000819 is 9180004.

4000819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4000819 - 2⁷ = 4000691 is a prime.

It is a super-2 number, since 2×4000819² = 32013105341522, which contains 22 as substring.

It is a Duffinian number.

4000819 is a modest number, since divided by 819 gives 4 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 4000819.

It is not an unprimeable number, because it can be changed into a prime (4000813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11812 + ... + 12145.

It is an arithmetic number, because the mean of its divisors is an integer number (1006236).

Almost surely, 2^4000819 is an apocalyptic number.

4000819 is a deficient number, since it is larger than the sum of its proper divisors (24125).

4000819 is a wasteful number, since it uses less digits than its factorization.

4000819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24124.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 4000819 is about 2000.2047395204. The cubic root of 4000819 is about 158.7509384697.

The spelling of 4000819 in words is "four million, eight hundred nineteen", and thus it is an aban number.