3820389 has 4 divisors (see below), whose sum is σ = 5093856. Its totient is φ = 2546924.

The previous prime is 3820379. The next prime is 3820391. The reversal of 3820389 is 9830283.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3820389 - 2⁵ = 3820357 is a prime.

It is a super-2 number, since 2×3820389² = 29190744222642, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3820319) 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, 636729 + ... + 636734.

It is an arithmetic number, because the mean of its divisors is an integer number (1273464).

Almost surely, 2^3820389 is an apocalyptic number.

It is an amenable number.

3820389 is a deficient number, since it is larger than the sum of its proper divisors (1273467).

3820389 is a wasteful number, since it uses less digits than its factorization.

3820389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273466.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 3820389 is about 1954.5815408931. The cubic root of 3820389 is about 156.3276725289.

The spelling of 3820389 in words is "three million, eight hundred twenty thousand, three hundred eighty-nine".